Suppose That a Firm in a Monopolistically Competitive Market Has

Suppose that a firm in a monopolistically competitive market has a constant marginal cost and it is making a positive profit in the short run.What will happen in the long-run equilibrium?

A) The firm will keep producing the same quantity but earn zero profit.
B) The firm will produce zero units and earn zero profit.
C) The firm will produce more but earn zero profit.
D) The firm will produce less but earn a positive profit.