Which of the Following Predictions of the Bertrand Model Appear

Multiple Choice

Which of the following predictions of the Bertrand model appear to be unrealistic in the real world:

A) Firms in imperfectly-competitive markets tend to charge prices that are greater than marginal cost.
B) As the number of firms enter the industry prices tend to fall.
C) Firms in imperfectly-competitive markets tend to earn zero economic profits.
D) All of the above are unrealistic.
E) None of the above are unrealistic.