On a Hot Summer Day, a Construction Worker Enters a McDonald's

Multiple Choice

On a hot summer day, a construction worker enters a McDonald's fast-food restaurant. He orders the first Big Mac. He consumes it within 3 minutes. He then orders a second Big Mac and consumes it in 10 minutes. He eats only half of the third one in 18 minutes and throws away the rest. The store manager offers him the fourth for free. The construction worker says: "No thanks." Why?

A) For the construction worker, total utility increased at an increasing rate.
B) Marginal utility increased at an increasing rate.
C) Marginal utility declined as he consumed additional Big Macs.
D) The law of diminishing marginal utility does not apply to consumption of Big Macs.