The board, after the hearing on an exclusion or reduction petition, shall order one of the following by resolution:
(a) In the case of an exclusion petition, order the exclusion of all or any part of the real property described in the petition upon its finding that the property will not be benefited by the operations of the district in the vicinity of the benefit district.
(b) In the case of a reduction petition, order a change in the benefit assessment to all or any portion of the real property described in the petition to provide that it not exceed the amount of benefit derived by the operations of the district in the vicinity of the benefit district.
(c) Confirm the assessment on the real property subject to the petition as correctly reflecting the amount of benefit to the real property.