Suppose the Minimum Possible Price of Constructing Homes Is $50

Suppose the minimum possible price of constructing homes is $50 per square foot. As a result of a sharp drop in the demand for home construction, the equilibrium price of home construction falls to $40 per square foot. Assuming the home construction industry is perfectly competitive and there are no specialized inputs, firms will:

A) exit the industry, and the price will fall below $40 in the long run.
B) exit the industry, and the price will rise above $40 in the long run.
C) exit the industry, and the price will remain at $40 in the long run.
D) enter the industry as the price rises above $40 in the long run.