B.The thought of piano music symbolizes escape and freedom
The most important
development is that
they decide to get
married.
I'm kind of confused if your asking anybody to answer this for them selves personally or what but for me it's all of the above.
When the narrator shines the single beam of light on the old man's eye, that left a picture of the situation for me.
Another is when the narrator is hearing the heartbeat from under his floorboards and pacing around the room, growing more and more agitated until he finally confesses to the murder.