Why do people tend to eat more at all-you-can-eat buffet restaurants than at restaurants where each item is purchased separately?
a. once the all-you-can-eat meal is purchased, consumers view additional trips back to the buffet as having a price of zero.
b. mu/p is consistently greater at all-you-can-eat restaurants.
c. people who eat at all-you-can-eat restaurants do not experience diminishing marginal utility.
d. food at all-you-can-eat restaurants tends to have fewer calories, so consumers feel the need to consume a greater volume of food?