____ 15. Which person has the highest opportunity cost of obtaining a college degree (assuming that attending college requires giving up his or her current position)? A. Bill, who is unemployed. B. Jane, who is an unwed mother and earns $15,000 a year. C. Larry, who is a technician in the Navy earning $18,000 a year with free food and housing. D. Mary, who has a job earning $60,000 a year as a computer programmer. E. Unable to determine from the data given.