Which sentence best shows the narrator is transitioning to a flashback? from "The Tell-Tale Heart"

Explanation:

I got it correct on the test.

that his long years of service outweigh any faults he may have had.

he wanted to be remembered for the good things he did, one of those being when he gave up office so others would follow suit, but george washington wasn’t a man who thought he was perfect, he knew he made mistakes. he was a very talented soldier with a natural gift of tactic.

i believe it is the first option, having taken lessons