INTR.66 Benjamin gives up a movie night at the theater to be able to study for their Economics final (smart person). The opportunity cost of this decision is: Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a The enjoyment of watching a movie at the theater. b A higher Economics grade as a result of more hours of studying. C The enjoyment of watching a movie at the theater and the cost of a movie ticket. d The cost of a movie ticket