Answer:
A) Bernardo reads both fiction and nonfiction, and he likes it a lot.
D) Vivian met Laura at the coffee shop where she works after school.
E) When Mariana and Rahul studied with Lisa and Nico, it helped them.
Step-by-step explanation:
A vague pronoun is a pronoun that does not clearly refer to a specific antecedent. Vague pronouns usually make the sentence sound confusing.