Jasmine works at the public library after school. She makes $7.00 per hour. She cannot work more than 15 hours per work. If y=7x represents Jasmine's earning, what are the values in the domain?
A. x (greater than or equal symbol) 15
B. All real numbers.
C. 0 (greater than or equal to symbol) x (greater than or equal to symbol) 15
D. 1 (greater than or equal to symbol) x (greater than or equal to symbol) 15