You have the afternoon free. You have a choice between going to the movies with a friend or studying economics for three hours. If you go to the movies, you will spend $12.00 on a ticket and $4.75 on popcorn. If you choose to study economics for three hours, you will raise your exam grade by 15 points. Your opportunity cost of going to the movies is...
a. The $12.00 spent on the ticket but not the $4.75 spent on popcorn.
b. The $12.00 spent on the ticket and the $4.75 spent on popcorn.
c. The 15 points not earned on your exam grade.
d. The $12.00 spent on the ticket and the $4.75 spent on popcorn plus the 15 points on your exam grade.