Read this excerpt from "The Tell-Tale Heart" by Edgar Allan Poe.

I knew that sound well, too. It was the beating of the old man’s heart. It increased my fury, as the beating of a drum stimulates the soldier into courage.

How does this incident provoke the narrator's decision to murder the old man?

A- The old man is being noisy on purpose, just to irritate the narrator.

B- The sound of the old man's heartbeat gives the narrator an additional reason to hate him.

C - The narrator's headache is worsened by the sound of the old man's heartbeat.

D - The old man's heartbeat causes the narrator to recall his days as a soldier.