Margo Spends $10,000 on One Year's College Tuition

Multiple Choice

Margo spends $10,000 on one year's college tuition. The opportunity cost of spending one year in college for Margo is:

A) $10,000.
B) whatever she would have purchased with the $10,000 instead.
C) whatever she would have earned had she not been in college.
D) whatever she would have purchased with the $10,000 plus whatever she would have earned had she not been in college.