<span>c. object of a preposition
Possessive pronouns are like his/her, ours, whose and etc.
Relative pronouns are pronouns that conjuncts clauses, sentence fragments, or a phrase to a specific noun or pronoun as the subject.
Examples are:
Who
Whom
Which
Whoever
Whichever
Whomever
That
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I'd have to cross out B.) and C.), which leaves you with A.) and D.)
I'd have to go with D.) Pitiful