During the Next Hour John Can Choose One of the Following

Multiple Choice

During the next hour John can choose one of the following three activities: playing basketball,watching television,or reading a book.The opportunity cost of reading a book

A) depends on how much the book cost when it was purchased.
B) is the value of playing basketball if John prefers that to watching television.
C) is the value of playing basketball and the value of watching television.
D) depends on how much John enjoys the book.
E) is equal to the marginal benefit from reading the book.