With no explanation, chose the best option from "A" or "B". Rudy is hanging out with his friend Sam who has been down in the dumps recently due to the passing of his grandfather. Rudy wants to lighten the mood and cheer Sam up.

A: Rudy tells Sam a funny knock-knock joke that he heard the other day.
B: Rudy makes a joke that involves Sam's recently deceased granfather.
A.