Answer:
B) are well aware that their opportunity cost of attending college is very high.
Step-by-step explanation:
Opportunity costs refer to the extra costs or benefits lost from choosing one activity or investment over another alternative.
When we are talking about college athletes, that might mean a lot of money, since staying at college means that they will not be able to play professionally. Professional sports leagues use rookie contracts which are generally "cheap" to try to discourage college students form dropping out, but still those cheap contracts have 5 zeros.
Many players are concerned about their careers being too short and others are simply eager to become rich. So many decide to drop out of college and enter the draft.