How is the underlined pronoun used in the sentence? Paco and I started collecting sports cards several years ago. A. subject B. direct object C. possessive D. predicate nominative

The only pronoun in this sentence is I and it's used as a Subject so the correct answer is A. A subject is the doer of the action and here the pronoun I is used together with Paco to make a compound subject. The object is what you do the action on, and the predicate is the action itself. Simple subject would be if there was only one person doing it.