Both narrators are unreliable because they both

D) feel agitated and anxious. on Edg.2020

Explanation:

Read the excerpt from "The Tell-Tale Heart.”

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.

Read the excerpt from "The Black Cat.”

Hereafter, perhaps, some intellect may be found which will reduce my phantasm to the common-place—some intellect more calm, more logical, and far less excitable than my own, which will perceive, in the circumstances I detail with awe, nothing more than an ordinary succession of very natural causes and effects.

Both narrators are unreliable because they both

fear for their lives.

admit to being irrational.

are unusually calm.

feel agitated and anxious.

its repetition emphasizing that the chain is his own. sorry if i am wrong.