If a Firm in a Perfectly Competitive Market Faces the Cost

If a firm in a perfectly competitive market faces the cost curves in the graph shown and produces at the profit-maximizing level of output,which of the following is true? A firm will:

A) plan to exit the industry in the long run if price falls below $15.
B) continue to operate in the short run if price is below $11.
C) make positive profits any time the price is greater than $11.
D) will earn maximum profits at a quantity of 35.