If a monopolist could perfectly price-discriminate

(LO4, LO5, LO6)

a. the marginal revenue curve and the demand curve would coincide.

b. the marginal revenue curve and the marginal cost curve would coincide.

c. every consumer would pay a different price.

d. marginal revenue would become negative at some output level.

e. the resulting pattern of exchange would still be socially inefficient.