Adramatic production, such as a play, is told almost entirely through dialogue, or
a. how the actors perform
b. what the characters do
c. what the characters say
d. how the characters act

answer: "the beating heart symbolizes the narrator's conscience, or his sense of guilt and wrongdoing" so its b

explanation:

"to look at him, or hear him describe it, he had no guilt. however, poe decided to symbolize this man's subconscious guilt through the heartbeat."