Indefinite pronouns, like collective nouns, can be singular or plural, depending on how they are used in a sentence. Singular indefinite pronouns take a singular verb; plural indefinite pronouns take a plural verb. Here are some guidelines to follow: Indefinite pronouns that end in -one are always singular.
Explanation: Because in the passage it gives you a very detailed description about what happen and whats the author talking about but if i'm incorrect then its C
