Final answer:
Grace's internal conflict between returning the money or keeping it is a struggle between her id, which seeks immediate gratification, and her superego, which upholds her moral values. The correct answer to the question is (B) Id and superego.
Step-by-step explanation:
Grace's situation describes a moral dilemma where she must choose whether to return an extra hundred dollars mistakenly given to her by a bank teller. This conflict is between her id and superego. The id is the part of her psyche that demands immediate gratification and operates on the pleasure principle, while the superego constitutes the moral compass and the conscience, operating on social and moral ideals. The answer to the student's question is (B) Id and superego.
The superego would compel Grace to return the money, driven by the values and rules she has internalized from her culture and upbringing, as doing so is the socially and morally correct behavior. On the other hand, the id might urge her to keep the money, prioritizing immediate pleasure and benefit. Ultimately, Freud's theory suggests that a healthy personality is one where the ego can effectively mediate between the desires of the id and the moral demands of the superego.