Answer:
d. The cost of the parking permit is part of the opportunity cost of attending college if you would not have to pay for parking otherwise.
Step-by-step explanation:
Opportunity cost is a microeconomic concept used to describe how much an economic agent fails to earn in one economic activity by employing money in another economic activity. Thus, all expenses that a student performs to study at the university, including tuition, gasoline, parking, material, and time spent on the activity, is considered an opportunity cost, since all of this could be spent on another activity.