The Opportunity Cost of an Airplane Flight

Multiple Choice

The opportunity cost of an airplane flight:

A) differs across passengers only to the extent that each traveler pays a different airfare.
B) is identical for all passengers and equal to the number of hours a particular flight takes.
C) differs across passengers to the extent that both the airfare paid and the highest valued use of travel time vary.
D) is equal to the cost of a bus ticket, the next best form of alternative transportation to flying.