Read the following excerpt from "The Cask of Amontillado" and answer question.

THE thousand injuries of Fortunato I had borne as I best could, but when he ventured upon insult I vowed revenge. You, who so well know the nature of my soul, will not suppose, however, that gave utterance to a threat. At length I would be avenged; this was a point definitely, settled --but the very definitiveness with which it was resolved precluded the idea of risk. I must not only punish, but punish with impunity. A wrong is unredressed when retribution overtakes its redresser. It is equally unredressed when the avenger fails to make himself felt as such to him who has done the wrong.

It must be understood that neither by word nor deed had I given Fortunato cause to doubt my good will. I continued, as was my in to smile in his face, and he did not perceive that my smile now was at the thought of his immolation.

As a narrator, Montresor can best be described as _____.
A. a reliable narrator
B. an omniscient narrator
C. an unreliable narrator
D. He is not the narrator.

In literature, an unreliable narrator refers to a type of narrator that cannot be believed or trusted. This usually occurs in first-person narrators as these type of narrators are not objective, but tell the story from their point of view, but also, a narrator lacks credibility when the narrator is insane, too naive or a lier. In the case of the excerpt from "The Cask of Amontillado" the narrator on it which is Montresor can be described as an unreliable narrator, not only because he is telling the story from his point of view (first-person), but because Montresor seems to be lying and to be insane, this can be explained as the narrator is amused and smiling while he thinks in killing Fortunato and besides this, Montresor never explains the real reason why he wants to kill Fortunato except by stating "The thousand injuries of Fortunato I had borne as I best could" which implies this narrator might be lying or hiding information and therefore is unreliable.