MegaCorp is accused of behaving like a monopoly. Which of the following would be the best evidence to disprove the claim?

A. MegaCorp's profits are typically close to zero.

B. MegaCorp's marginal revenue is lower than its price.

C. MegaCorp leads a cartel of similar firms.

D. Each time MegaCorp expands its output, its average cost of production eventually falls.

E. MegaCorp charges a price equal to its marginal cost of production.