Donald Has Vast Riches and Consumes Thousands of Dollars Worth

Donald has vast riches and consumes thousands of dollars worth of consumer goods each week,yet he is never satisfied.Why not?

A) Wants are unlimited,but resources are finite.
B) Donald fails to choose rationally.
C) The law of diminishing marginal utility shows that consuming too many material goods leads to lower total utility.
D) Utility is unrelated to the level of consumption.