Kayla Receives an $18,500 Scholarship from the State University

Kayla receives an $18,500 scholarship from the state university.The university specifies that $8,500 is for tuition and books, while $10,000 is for room and board.In addition, Kayla works part-time at the campus library and earns $5,000.How much is Kayla required to include in her gross income?

A) zero
B) $5,000
C) $15,000
D) $23,500