An appositive explains or identifies
a. the verb
b. the noun or pronoun that follows it
c. the noun or pronoun that comes just before it.

C.The noun or pronoun that comes just before it.

Explanation:

The term apposition is part of the terminology proper to grammar, more specifically it is one of the elements of the subject of a sentence. The apposition is a noun that aims to identify the noun or pronoun that is close to it.

For example, read the following sentence:

I was fine, until Luan, my ex boyfriend, phoned me again.

In that phrase, the expression "my ex boyfriend" is an apposition that is identifying what is the noun "Luan".

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