From the choices stated above, the sentence which correctly uses an objective case pronoun is:
D. I'm thrilled that the winner of the election is her.
Objective case pronouns are the following: him, her, me, us, and them. They follow right after the verb and are used as its object.
Answer:
Margaret Atwood.
Explanation:
This is a quote from The Handmaiden's Tale written by Margaret Atwood.