The grammar rule about this topic says that: The specific antecedents are the nouns that are replaced by the pronouns.
Taking in consideration the above explanation the sentence which the pronoun and antecedent not in agreement is option A.
Jane is planning her college schedule, something you need to do when register for classes.
The pronoun "you" don't replace the antecedent Jane.
Answer: Making someone very weak and infirm.
"debilitating back pain"
tending to weaken something.
"the debilitating effects of underinvestment"
Explanation:
I believe it’s B. Starting the story in the middle
I think it would be use active verbs and colorful adjectives