Use the Figure Below to Answer the Following Question

Multiple Choice

Use the figure below to answer the following question. Figure 12.4.3
-Refer to Figure 12.4.3.The outcome is efficient if

A) the monopoly is able to perfectly price discriminate.
B) the price consumers pay is greater than marginal cost.
C) the price consumers pay is less than marginal cost.
D) the quantity produced is 80 units.
E) the quantity produced is 20 units.