Answer:
The sentence in which the pronoun and antecedent are not in agreement is the following one:
A. Jane is planning her college schedule, something you need to do when you register for classes.
Explanation:
The pronoun we see is "you", and the antecedent here is the proper noun "Jane". Therefore, in order to be in agreement, the pronoun for the antecedent "Jane" should have been "she", since the antecedent is in third person singular, feminine.
Other examples:
Mary likes music, and she always listens to it. ("Mary" is the antecedent, and "she" is the pronoun that is in agreement with it)
Bob and Nick like to climb mountains, and they always invite people to go with them. ("Bob and Nick" is the antecedent, being "they" and "them" the pronouns that are in agreement with it)
