Answer:
C. The patch of white fur
Step-by-step explanation:
What symbolized the narrator’s guilt about killing Pluto in Edgar Allan Poe’s short story “The Black Cat” is "The patch of white fur".
An excerpt from the story supports that:
"My wife had called my attention, more than once, to the character of the mark of white hair, of which I have spoken, and which constituted the sole visible difference between the strange beast and the one I had destroyed...It was now the representation of an object that I shudder to name—and for this, above all, I loathed, and dreaded, and would have rid myself of the monster had I dared—it was now, I say, the image of a hideous—of a ghastly thing—of the GALLOWS!—oh, mournful and terrible engine of Horror and of Crime—of Agony and of Death!"
From the excerpt, we discover that the patch of white fur on the breast of the second cat brought the guilt of what he had done. As a result of his guilt, he loathed and dreaded the second cat.
Then when he could not find the cat after he murdered his wife, that dread left him. Here is an excerpt:
"The second and the third day passed, and still my tormentor came not. Once again I breathed as a free man.
The monster, in terror, had fled the premises for ever! I should behold it no more! My happiness was supreme! The guilt of my dark deed disturbed me but little. Some few inquiries had been made, but these had been readily answered. Even a search had been instituted—but of course nothing was to be discovered. I looked upon my future felicity as secured."
So this means the second cat, with the patch of white symbolized guilt.