Suppose that fot each firm in the competive market for potatoes, long - run avorage cont is minimized at 20 e per pound when 500 pounds are grown. The demand for polatoes is Q a 10,000 . If the long - run supply curve is horizontal, then how many ferss will this industry sustain in the long run? A. 100 B. 0 C. 50,000 D. There is not enough information to answer.