The answer is C as it is said at the start of the introductory paragraph I hope this helps
He is the pronoun in the sentence :)
Answer:
When you say, "to swallow something hook, line, and sinker" it means to completely fall for whatever was said or to completely believe what was told or presented. Usually, what was presented is a lie, and when the person is gullible enough to believe it, the phrase applies.
