I think that the answer is B
C. Words- should be at least...
In "Tell Tale Heart" by Edgar Allan Poe, the beating heart the narrator heard symbolizes, at least in my opinion, the narrator's guilt.
He killed a man, and he kept hearing his beating heart, even though it was impossible. He kept hearing it because he felt guilty because he murdered a person, and he had to come clean to the police officers in some way. If he hadn't, he would go completely mad, and his crime would go unpunished, probably.
We can argue that Dickinson sees death here as nothing but guide to eternity.
In the poem Death is not sinister nor scary, instead its a courteous and patient gentlemen that is there to guide the narrator even though she had not time for it. He accompany's her until its her time and though then things get bit spooky it is worth it as in the fourth stanza she arrives at her destination which is eternity. She relishes that death is not death, but immortality.