Suppose You Want to Make Rational Dining Choices at an All-You-Can-Eat

Multiple Choice

Suppose you want to make rational dining choices at an all-you-can-eat buffet.How do you apply the rational spending rule?

A) you can't because the fixed price is a sunk cost that should not be taken into consideration.
B) you can't because once you have paid the sunk cost the price of each serving is zero,and since you can't divide by zero you cannot apply the rational choice formula.
C) you should continue to eat every item until your marginal utility from consuming each item equals the fixed price of the buffet.
D) you should continue to eat until your marginal utility from consuming each item exactly equals zero plus your non-monetary costs of staying at the buffet.