The mayor of a city wants to plant as many trees as possible wit budget of $936. Each tree costs $9. Which expression can be us the number of trees that can be planted?

A. (90/ 9)+(36/ 9)
B. (900/ 9)-(36/ 9)
C. (90/ 9)-(36/ 9)
D. (900/ 9)+(36/ 9)