Read the excerpt from "The Tell-Tale Heart.” If still you think me mad, you will think so no longer when I describe the wise precautions I took for the concealment of the body. The night waned, and I worked hastily, but in silence. First of all I dismembered the corpse. I cut off the head and the arms and the legs.

The narrator of this excerpt is unreliable because

he is very intelligent but not highly educated.
he is very naive and inexperienced.
he wants to be caught for the crime he has just committed.
he claims to be rational while committing an irrational act.