An Industry Has 100 Firms

An industry has 100 firms.These firms have identical production functions.In the short run, each firm has fixed costs of $200.There are two variable factors in the short run and output is given by y =(min{x₁, 4x₂}) ^1/2.The cost of factor 1 is $5 per unit and the cost of factor 2 is $5 per unit.In the short run, the industry supply curve is given by

A) Q = 100p/12.5.
B) Q = 100p/10.
C) Q = 580p^1/2.
D) the part of the line Q = 50(min{5, 20}) for which pQ > 200/Q.
E) None of the above.