Ron,age 19,is a Full-Time Graduate Student at City University

Ron,age 19,is a full-time graduate student at City University.During 2012,he received the following payments: Ron served as a resident advisor in a dormitory and,therefore,the university waived the $2,500 charge for the room he occupied.What is Ron's adjusted gross income for 2012?

A) $1,500.
B) $4,000.
C) $7,500.
D) $15,500.
E) None of the above.