Which of the Following Is True

Multiple Choice

Which of the following is true?

A) If there are only two firms in a market, prices must be above marginal cost.
B) If there is only one firm in a market, prices must be above marginal cost.
C) Both if there are only two firms in a market, prices must be above marginal cost and if there is only one firm in a market, prices must be above marginal cost are correct.
D) None of the answers is correct.