Which sentence uses a verb that agrees with its compound subject? a. either calculators or an adding machine make an accountant's work easier. b. neither bread nor rolls were served at dinner. c. the team members and the coach has left the field. d. both cows and goats produces milk for cheese.

I believe B would be the answer, as the subject closest to the verb (rolls) corresponds to the verb (when there is an "or" or "nor" in a sentence, the verb should correspond to the subject closest to it). For A, "adding machine" should correspond to "make," but it doesn't. For C, the subject is plural (team members and the coach), but the verb is singular; the case is the same for D. 

The answer is b i guess