Answer:
Scrooge believes Marley's ghost is the result of an indigestion. He says "You may be an undigested bit of beef, a blot of mustard, a crumb of cheese, a fragment of an underdone potato. There's more of gravy than of grave about you, whatever you are!".
I know this is late but for the future peoples running into this question I just took the test and the answer was A. the commonality of shared feelings and experiences.
