Please help me! Brainliest + 15 pts!

A piano tuner charges $63 for 1.5 hours of work. Which proportion can be used to find x, the number of dollars the Piano tuner charges for 4 hours of work?

A: x/4 = 1.5/63

B: x/63 = 3.5/2.5

C: x/63 = 1.5/4

D: x/4 = 63/1.5

Please answer correctly and thanks! :)