Question

Which sentence contains a vague pronoun reference?

Every time the cloth got dirty, he thoroughly washed it in the bucket.
The politician was not well prepared for the debate and interview, so he faked it.
The dog was constantly itching himself because he had fleas.

Answer 1

Sentence 2.
"It" is vague — it's unclear whether he "faked the debate/interview" or "faked being prepared."
Clearer: "The politician was not well prepared for the debate and interview, so he pretended to be prepared."