Margo Spends $30 000 on 1 Year's University Tuition

Multiple Choice

Margo spends $30 000 on 1 year's university tuition.The opportunity cost of spending 1 year in university for Margo is:

A) $30 000.
B) whatever she would have purchased with the $30 000 instead.
C) whatever she would have earned had she not been in university.
D) whatever she would have purchased with the $30 000 plus whatever she would have earned had she not been in university.