Plaintiffs’ assignments of error and contentions focus on the second issue submitted to the jury; i.e., the issue of contributory negligence. By cross-assignments of error, defendant Jedco contends its *120 motion for directed verdict should have been granted and the issue of its negligence should not have been submitted to the jury. For the reasons stated herein, we hold plaintiffs are entitled to a new trial on the issue of Mr. Purser’s contributory negligence.
I.
A.
Plaintiffs initially argue they were entitled to a directed verdict as to Jedco’s affirmative defense alleging that Mr. Purser was contribu-torily negligent. The basis for their argument is that Mr. Purser’s mental incompetence due to senility rendered him incapable of contributory negligence. We have not found a case in North Carolina dealing with the issue of whether an adult whose mental capacity has been impaired or diminished due to advanced age, disease, or senility is capable of contributory negligence. Our Supreme Court has held “one who has
capacity to understand
and avoid a known danger” is contributorily negligent if he fails to take advantage of the opportunity to avoid the danger and is injured,
Presnell v.
Payne,
We have reviewed the other arguments urged by plaintiffs in support of their contention that the trial court erred by denying their motions for directed verdict and judgment notwithstanding the verdict as to the issue of Mr. Purser’s contributory negligence, and conclude they are without merit. We hold that the issue of Mr. Purser’s contributory negligence was properly for the jury.
B.
In its answer, Jedco also alleged that Mr. Purser’s “sitter” had neglected her duties and that her negligence was imputed to Mr. Purser. Plaintiffs contend the trial court erred by denying their motion for directed verdict as to the defense of imputed contributory negligence. We agree.
Jedco had the burden of proving the “sitter” was negligent in order to impute such negligence to Mr. Purser and bar plaintiffs’ recovery. N.C. Gen. Stat. § 1-139. (Party asserting contributory negligence has burden of proving such defense). The “sitter”, who was not identified at trial, was employed by Joan Stacy, who was acting for her father pursuant to a power of attorney. Thus, the sitter was acting as Mr. Purser’s subagent. The traditional view has been that a principal is liable for the torts of his authorized subagent to the same extent as he is liable for the torts of his primary agent, 3 C.J.S.
Agency
§ 431 (1973), and the general rule is that “if the principal or master is injured by the negligence of a third party and by the concurring contributory negligence of his own servant or agent, the negligence of the servant acting within the scope of his employment or the agent acting within the scope of his power to bind the principal may be imputed to the master or principal.” Annot.,
Imputation of Servant’s or Agent’s Contributory Negligence to Master or Principal,
However, one relying on the defense of contributory negligence must prove facts from which such negligence may reasonably be inferred, and evidence which raises only a bare conjecture is insufficient to warrant submission of the issue to the jury.
Bruce v. Flying Service,
The evidence leaves for mere conjecture the questions of how Mr. Purser left the building, whether the “sitter” had completed her shift, and even if she had not, whether her conduct in going to the bathroom while Mr. Purser was engaged in a telephone conversation was a breach of her duty. Just as negligence cannot be inferred from the mere fact of injury, the negligence of one’s caretaker cannot be inferred from the mere fact that the person in her care suffers an accidental injury.
See Jeffreys v. Burlington,
C.
We also conclude that the trial court committed error by the manner in which it phrased the issue of contributory negligence. The form and number of issues submitted is within the court’s discretion.
Wilson v. Pearce,
The issue as framed to the jury in the instant case presented the separate questions of whether Mr. Purser contributed to his injury by his own negligence or whether he was contributorily negligent through the imputed negligence of his “employees”. These questions were propositions to which the jury might give separate answers, allowing the jury to answer the issue without reaching a unanimous verdict as to either proposition. Therefore, the jury’s verdict is uncertain. See Edge, supra. Plaintiffs were obviously prejudiced by the error, especially in view of our holding that the issue of imputed contributory negligence was improperly submitted.
D.
By reason of errors as set forth above, we conclude plaintiffs are entitled to a new trial on the issue of contributory negligence.
II.
By cross-assignments of error pursuant to N.C.R. App. P. 10(d), Jedco contends the trial court should have granted its motion for directed verdict as to plaintiff’s claim against it. Jedco argues there was insufficient evidence of actionable negligence on its part to take the case to the jury. We find no merit in its arguments.
When ruling upon a defendant’s motion for a directed verdict, the evidence must be considered in the light most favorable to the plaintiff, and the plaintiff must be given the benefit of every reasonable inference which may be drawn therefrom.
Manganello v. Permastone,
Inc.,
Jedco first argues that its motion for a directed verdict should have been granted because Mr. Purser was a mere licensee upon the construction site, and Jedco owed him only a duty not to wilfully injure him and not to wantonly and recklessly expose him to danger. *124 However, at trial, Jedco did not offer Mr. Purser’s status as a ground for its motion for directed verdict and is, therefore, precluded from making the argument for the first time on appeal. La Grenade, supra.
Jedco’s remaining contention is that the evidence was insufficient to support plaintiffs’ claim that Jedco’s negligence was a proximate cause of Mr. Purser’s fall and resulting injuries. However, the evidence tended to show that when Jedco’s superintendent, Richard Woosley, saw Mr. Purser on the construction site, he directed him across the site to a doorway which had been designated a hazardous area, rather than escorting Mr. Purser away from the site in the direction from which he had entered. David Royal, an employee of an electrical subcontractor on the project, testified that Mr. Purser’s foot got caught on the threshold to the door as he attempted to enter; there was testimony from Mr. Purser’s grandson that minutes after the fall, he observed a gap between the door and the ramp leading up to it, as well as a difference between the height of the ramp and the doorsill. When he later attempted to bring the ramp flush with the door, the ramp was higher than the doorsill and prevented the door from opening. Though Richard Woosley denied the ramp was in the position testified to by other witnesses at the time of Mr. Purser’s fall, he admitted that if a gap or difference in elevation had existed, it would not have been safe. We hold that the evidence, considered in the light most favorable to the plaintiffs, and giving them the benefit of the reasonable inferences which may be drawn therefrom, is sufficient, to support a finding that Mr. Purser fell and was injured as a proximate result of negligence on the part of Jedco. The trial court did not err by denying Defendant Jedco’s motion for directed verdict.
III.
In summary, we find no error in the denial of defendant Jedco’s motion for directed verdict nor in the denial of plaintiffs’ motion for directed verdict on the issue of Mr. Purser’s own contributory negligence. However, for the reasons stated above, we hold that the trial court erred by permitting the jury to consider whether plaintiffs are barred from recovery by reason of the contributory negligence of Mr. Purser’s “sitter”, and that such error necessitates a new trial on the issue of contributory negligence.
No error in part, reversed in part, and remanded for a new trial on the issue of contributory negligence.
