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

a. One of the assistants in the shop don't work very hard.

b. Many of the monster in Ezra's drawing was bright green faces.

c. Several of the coats is missing.

d. No one is allowed to enter my room!

D is the correct answer. Let's break this down. First in a, the pronoun is the assistant that does not work very hard. Because we are only talking about one assistant, we should use doesn't instead of don't. Now b, many refers to multiple monsters. The pronoun was wrong as well as the verb. Both should be plural. In c, because coats is plural, the verb is should be plural. And d is the correct answer.