Annabel is weighing two opportunities, one is to work at the bank, while the other is to volunteer at a charity that means a lot to her. She decides to join the charity as a volunteer. What is meant by opportunity cost? Question 2 Select one: a. The opportunity cost is her time volunteering b. The opportunity cost is the money she would have made working at the bank c. The opportunity cost is volunteering d. The opportunity cost is that the charity is a non-profit