Connotation involves all of the positive and negative things associated with a word. Words with the same denotation (meaning) can have very different connotations.
for example: calling someone who dislikes spending money thrifty budget-savvy is very different from calling that person stingy or scrooge.
Hello! I would say the narrator is insane because he can still hear the old man’s heart thumping from underneath the floorboards even after he killed him. His guilt gets the better of him and he turns himself in to the cops. I don’t have any evidence sense I don’t have the story on me, but use something from the story along the lines where he “hears” the thumping of his heart as evidence.
C. to persuade.
It is trying to persuade you to choose one topic over the other by providing facts and/or opinions to the reader.