Answer: The incorrect statement regarding relevant revenues is "past or future revenues may be relevant-"
Explanation:
Relevant revenue is one that differ between the options that are relevant to a decision. If an income will be the same regardless of the option selected, the decision has no effect on the income.
So The relevant revenue is future.
A past income has already happened and will be the same regardless of the decision that is made, therefore it is not relevant when making a decision.