Which of the Following Is a Difference Between a Monopolistically

Which of the following is a difference between a monopolistically competitive market and a perfectly competitive market in the long run?

A) Firms in a monopolistically competitive market earn zero economic profits in the long run, while firms in a perfectly competitive market earn positive economic profits in the long run.
B) Firms in a monopolistically competitive market earn zero economic profits in the long run, while firms in a perfectly competitive market incur losses in the long run.
C) Firms in a monopolistically competitive market charge a price higher than marginal cost in the long run, while firms in a perfectly competitive market charge a price equal to marginal cost in the long run.
D) Firms in a monopolistically competitive market charge a price lower than marginal cost in the long run, while firms in a perfectly competitive market charge a price equal to marginal cost in the long run.