A student has no plans for a Friday evening. She withdraws $5 from the $100 she keeps in a savings account and uses it to buy a gift to bring to a party, where admission costs nothing. What does this involve?
- 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