A Single-Price Monopoly

A single-price monopoly

A) must practice price discrimination.
B) can lower its price for only a few select consumers if it wants to increase its sales.
C) will set its price equal to a consumer's willingness to pay.
D) must lower the price for all customers if it wants to increase its sales.
E) is able to raise its price as high as it wants and consumers must still buy from it because it is a monopoly.