Jamal has an hour of free time available for studying, sleeping, or running. If Jamal decides to study for that hour, what is the opportunity cost of that decision?
Multiple Choice
a. the lost sleep.
b. the run that was sacrificed in order to study.
c. both the lost sleep and forgone run.
d. It is impossible to determine the opportunity cost for Jamal without knowing which activity was the next best alternative.