In a Monopolistically Competitive Industry, Which Statement Is True

In a monopolistically competitive industry, which statement is true?

A) MR = MC ≤ P = ATC in the long run
B) ATC is minimized in the long run.
C) MC = P > ATC and a firm can earn positive economic profits in the long run.
D) MC = ATC = P in the long run equilibrium.
E) None of the above.