For Which of the Following Individuals Would the Opportunity Cost

For which of the following individuals would the opportunity cost of going to university be highest?

A) A promising young mathematician who will command a high salary once she earns her university degree.
B) A student with average grades who has never held a job.
C) A famous, highly-paid actor who wants to take time away from show business to finish university and earn a degree.
D) A student who is the best player on his university rugby team, but who lacks the skills necessary to play professional rugby.