Use the Figure Below to Answer the Following Questions

Use the figure below to answer the following questions. Figure 13.2.4
-Refer to Figure 13.2.4.The figure represents a monopolistically competitive firm in short-run equilibrium.In the long run,

A) new firms enter,and each existing firm's demand curve shifts leftward.
B) new firms enter,and each existing firm's demand curve shifts rightward.
C) existing firms exit,and each remaining firm's demand curve shifts leftward.
D) existing firms exit,and each remaining firm's demand curve shifts rightward.
E) the equilibrium is the same as in the short run.