A driver travels for 2 hours at 60 miles per hour, during which her car gets 30 miles per gallon of gasoline. She is paid \$ 0.50 per mile, and her only expense is gasoline at \$ 2.00 per gallon. What is her net rate of pay, in dollars per hour, after this expense?

**Answer Choices**

A. 20

B. 22

C. 24

D. 25

E. 26