The Diagram Below Shows a Pharmaceutical Firm's Demand Curve and Marginal

The diagram below shows a pharmaceutical firm's demand curve and marginal cost curve for a new heart medication for which the firm holds a 20- year patent on its production. FIGURE 10- 5
-Refer to Figure 10- 5. Assume this pharmaceutical firm charges a single price for its drug. At its profit- maximizing level of output, it will generate a total profit represented by

A) areas B+C+F+G+H+I.
B) the sum of areas A through K.
C) areas A+B+C+F+G.
D) areas D+E.
E) - it is not possible to determine with the information provided.