If a profit-maximizing firm in a perfectly competitive market is incurring an economic loss, then it must be producing a level of output where

A) price is greater than marginal cost.

B) price is greater than marginal revenue.

C) marginal cost is greater than marginal revenue. D) average total cost is greater than marginal cost.

D) average total cost is greater than marginal cost.

E) average total cost is less than marginal cost.

Please explain why, thank you!