Which of the Following Is Not an Example of the Opportunity

Multiple Choice

Which of the following is not an example of the opportunity cost of going to school?

A) The money a student could have earned by working if he had not gone to college.
B) The nap a student could have enjoyed if he had not attended class.
C) The party a student could have enjoyed if he had not stayed in to study for his exam.
D) The money a student spends on rent for his apartment while attending school.