In the Process of Producing 1 Hormone-Free, Stress-Free, Happy Cow

In the process of producing 1 hormone-free, stress-free, happy cow, the New Age Cattle Ranch produces 1 ton of natural, organic plant fertilizer. Demand for the ranch's cattle is given by P_c = 2,000 - 5Q_c, and demand for fertilizer is given by P_f = 500 - 2Q_f. The cost of producing Q cow-fertilizer bundles is C = 5,000 + 200Q. To maximize profits, the ranch should

A) produce 164.29 cow-fertilizer units, sell 164.29 cattle, and sell 164.29 tons of fertilizer.
B) produce 180 cow-fertilizer units, sell 180 cattle, and sell 125 tons of fertilizer.
C) produce 180 cow-fertilizer units, sell 180 cattle, and sell 75 tons of fertilizer.
D) produce 180 cow-fertilizer units, sell 180 cattle, and sell 180 tons of fertilizer.
E) produce 200 cow-fertilizer units, sell 200 cattle, and dispose of all the fertilizer in an environmentally friendly manner.