What is an important difference between the situations faced by a profit-maximizing monopolistically competitive firm in the short run and in the long run?

Select one:

a.In the short run, price may exceed average total cost; in the long run, price equals average total cost.

b.In the short run, price may exceed marginal cost; in the long run, price equals marginal cost.

c.In the short run, price may exceed marginal revenue; in the long run, price equals marginal revenue.

d.In the short run, price may exceed average variable cost; in the long run, price equals average variable cost.