From Edgar Allan Poe's "The Black Cat":

"For the most wild, yet most homely narrative which I am about to pen, I neither expect nor solicit belief. Mad indeed would I be to expect it, in a case where my very senses reject their own evidence. Yet, mad am I not-and very surely do I not dream."

Why is the passage an example of verbal irony?

the narrator is truthful

the narrator does not expect to believed

the narrator does not write his story

the narrator really is mad