Read the excerpt from "the tell-tale heart.”

but you should have seen me. you should have seen how wisely i proceeded—with what caution—with what foresight—with what dissimulation i went to work! i was never kinder to the old man than during the whole week before i killed him. and every night, about midnight, i turned the latch of his door and opened it—oh so gently! and then, when i had made an opening sufficient for my head, i put in a dark lantern, all closed, closed, that no light shone out, and then i thrust in my head. oh, you would have laughed to see how cunningly i thrust it in!

which statement best explains how the reader can determine that the narrator is unreliable?

a. the narrator is very kind to the old man during the whole week before the murder.

b. the narrator checks on the old man every night at midnight to ensure his well-being.

c. the narrator closes the lantern tightly so the old man is not awakened by the bright light.

d. the narrator believes that his audience will approve of and even laugh at his plot to murder the old man.