Use the Following to Answer Question

Multiple Choice

Use the following to answer question:
Figure: Monopoly Profits in Duopoly
-(Figure: Monopoly Profits in Duopoly) Use Figure: Monopoly Profits in Duopoly.Suppose there are two firms in this industry.Each firm faces an identical demand curve,D₁, and the market demand curve is D₂.The figure illustrates how firms can reap monopoly profits,even in an industry with:

A) free entry and exit.
B) two firms.
C) monopolistic competition.
D) a four-firm concentration ratio of 50.