The production function for a competitive firm is Q, K denotes the quantity of capital, L denotes the quantity of labor, sqrtK denotes the square root of K, sqrtL denotes the square root of L. Q equals to the product of sqrtK and sqrtL. The firm sells its output at a price of $10, and can hire labor at a wage of $5. Capital is fixed at one unit. The profit maximizing quantity of labor is

Select one:

a.2 over 5.

b.None of the answers are correct.

c.10.

d.1.