Among the People Who Are Characterized Below, Who Has the Highest

Among the people who are characterized below, who has the highest opportunity cost of leisure?

A) an attorney who earns $200 per hour and who plays golf during her leisure time
B) a medical doctor who earns $210 per hour and who sleeps during his leisure time
C) a retail clerk who earns $15 per hour and who watches TV during her leisure time
D) a waiter who earns $12 per hour and who reads poetry during his leisure time