The Following Graph Shows the Demand and Cost Curves of an Imperfectly

The following graph shows the demand and cost curves of an imperfectly competitive firm. MC and ATC represent the marginal cost curve and the average cost curve respectively.Figure 9.1
​

-Refer to Figure 9.1. At price P₁, the firm sells quantity Q₁, and total revenue is shown by:

A) the rectangle ABCD.
B) the rectangle ABEF.
C) the rectangle FECD.
D) the distance AB.
E) the distance BC.