On Friday evening, a student has no plans. She takes out $5 from the $100 held in a savings account and uses it to purchase a present to bring to a party, where admission costs nothing. What is this an example of?
- Aan opportunity cost equal to $95$
- Ban opportunity cost equal to other goods she could have bought for $5$
- Cno opportunity cost, as entrance to the party is free
- Dno opportunity cost, as she had no better way of using the time