Use the Figure Below to Answer the Following Question

Multiple Choice

Use the figure below to answer the following question. Figure 11.4.4
-Refer to Figure 11.4.4,which shows the cost curves for a perfectly competitive firm.If all firms in the market have the same cost curves and the price is $16 per unit,

A) the market is in long-run equilibrium.
B) in the long run,firms will leave this market.
C) in the long run,the price will fall as new firms enter the market.
D) the firm is making zero economic profit.
E) none of the above