Answer: C) the importance of money.
Step-by-step explanation: In literature, the theme is the underlying message of a story, it is what critical belief about life is the author trying to convey in the writing of a novel, play, short story or poem. Usually this belief, or idea, is universal and transcends cultural barriers. In the given excerpt from "A Doll's House" we can see reflected the theme of the importance of money, because Nora is explaining all the things her husband had to do in order to earn more money.