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

a. A robin and a sparrow has eaten from the bird feeder.

b. Either Mario or Larry are a nominee for the award.

c. Either those leftovers or the trashcan are causing that smell.

d. Neither my aunts nor my uncles have arrived yet.

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.