Darin receives a $3,000 commission for the first 10 cars he sells and 450 for each additional car he sells. Which of the following expresses the commission C, in dollars, Darin receives if he sells x cars in a month, where x > 10 ?
A. C= 450x + 3, 000
B. C= 450x-1,500
C. C = 350x - 1, 50c
D. C = 450x + 1, 500