Use the Following to Answer Questions Below

Use the following to answer questions below:

-Which of the following is a characteristic of both monopolistic competition and monopoly?

A) Firms face significant barriers to entry.
B) A firm's marginal revenue curve is below its demand curve.
C) In the long run, a firm will earn zero economic profit.
D) In the long run, a firm will produce a level of output that corresponds to the minimum point of its average total cost curve.