In Pure Competition, If the Market Price of the Product

In pure competition, if the market price of the product is lower than the minimum average total cost of the firms, then

A) some firms will enter the industry and the industry supply will increase.
B) other firms will exit the industry and the industry supply will decrease.
C) some firms will exit the industry and the industry supply will increase.
D) other firms will enter the industry and the industry supply will decrease.