The Inverse Demand Function for Coffee Is P = 50,000

The inverse demand function for coffee is p = 50,000 - 2q, where q is the number of tons produced and p is the price per ton. Total revenue from coffee sales be maximized when the output level is

A) 25,000 tons.
B) 15,000 tons.
C) 17,500 tons.
D) 12,500 tons.
E) none of the above.