Read this passage from "The Black Cat": This hideous murder accomplished, I set myself forthwith, and with entire deliberation, to the task of concealing the body. I knew that I could not remove it from the house, either by day or by night, without the risk of being observed by the neighbors. Many projects entered my mind.

What element of this passage helps the reader infer that the narrator might possibly be insane and without morals?

A. The use of dialogue
B. The complex sentences
C. The businesslike tone
D. The direct characterization

ANSWER ASAP.. WILL GIVE BRAINLIEST