Which sentence uses a verb that agrees with its compound subject?

AA robin and a sparrow has eaten from the bird feeder.
BEither Mario or Larry are a nominee for the award.
CEither those leftovers or the trashcan are causing that smell.
DNeither my aunts nor my uncles have arrived yet.

Verified Answer :

The correct answer is C because it is the only option where a verb agrees with its compound subject correctly.
In A, it should be 'have eaten', because there are two subjects, 'a robin' and 'a sparrow'.
In B it should be 'are nominees', because there are two of them.
In D, neither goes with a singular verb.