What does an intensive pronoun do?

A. It is used as the direct or indirect object in a sentence.
B. It is the noun or pronoun to which a pronoun refers to in the sentence.
C. It is the person or object that is affected by the action of a verb.
D. It is used to emphasize the noun or pronoun it refers to.

D. It is used to emphasize the noun or pronoun it refers to.

D. It is used to emphasize the noun or pronoun it refers to.