Read the passage from "The Tell-Tale Heart" by Edgar Allan Poe.

TRUE!-nervous-very, very dreadfully nervous I had been and am; but why will you say that I am
mad? The disease had sharpened my senses-not destroyed-not dulled them. Above all was the sense of
hearing acute. I heard all things in the heaven and in the earth. I heard many things in hell. How, then, am I
mad? Hearken! and observe how healthily-how calmly I can tell you the whole story.

What does Poe tell us explicitly about his narrator in this passage?

Please choose all that apply.

His sense of hearing is heightened.

He is nervous.

He is a good writer.

He is mentally unstable.