Answer:
B. That he is without morals and possibly insane.
Explanation:
Edgar Allen Poe's short story "The Black Cat" is about an unnamed narrator and his act of killing his cat as well as unintentionally murdering his wife. The story then ends with the discovery of the murder after his new cat was left inside the same wall block that the man used to hide his wife's body.
In the given passage, the narrator uses more of a business-like tone rather than a distraught man whose wife had just died. when he refers to the murder as a task, declaring "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" shows how he views the gruesome act as more like a task he must conceal rather than the loss of a human being, that too, his own wife.
Thus, the tone of the passage shows how he is without any morals and may possibly be insane.
