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.The figure shows how an industry consisting of two firms that face identical demand curves (D₁) can collude to increase profits.Which assumption is NOT a part of the analysis illustrated by the model?

A) The two firms are identical.
B) The two firms sell identical products.
C) While the firms face the same MC curves,their respective TC curves have unequal slopes.
D) Each firm has a horizontal marginal cost curve.