Carlos, age $19,$ is a full$-$time graduate student at City University. During $2022,$ he received the following payments:

Cash award for being the outstanding resident adviser

$ $1,500$

Resident adviser housing

$2,500$

State scholarship for ten months $($tuition and books$)$

$6,000$

State scholarship $($meals allowance$)$

$2,400$

Loan from college financial aid office

$3,000$

Cash support from parents

$2,000$

$$17,400$

$$

Carlos served as a resident adviser in a dormitory and, therefore, the university waived the $$2,500$ charge for the room he occupied. What is Carlos$$s adjusted gross income for $2022?$

a$.$

$$1,500.$

b$.$

$$3,900.$

c$.$

$$9,000.$

d$.$

$$15,400.$