At the conclusion of the hearing, the board may either:
- (a) Adopt the report.
- (b) Modify the report.
- (c) Cause a new report to be made to be again set for hearing as in the first instance.
- (d) Abandon, either in whole or in part, the levying of any assessment pursuant to the report.
- (e) Determine that the assessment is necessary and make an order of supplementary assessment.