The table below shows the relationship between the number of times you get your car washed each month and your total monthly benefit from car washes. Each car wash costs $15.What’s the average benefit of 4 car washes per month?

The table below shows the relationship between the number of times you get your car washed each month and your total monthly benefit from car washes. Each car wash costs $15.What’s the average benefit of 4 car washes per month?

A.$8

B.$12

C.$4

D.$14

正确答案：$14