In "the black cat," what happens after the narrator's character undergoes "a radical alteration for the worse"?

(i can't select because there is no options but, i will answer) using evidence effectively. most of the assignments you will do in university will ask you to make an argument, to take a stance, or to prove a hypothesis. the best way to do this is to research the topic, develop a thesis statement, hypothesis, or claim and then use evidence to support this claim.

i would say the correct answer is not concrete.