The Following Figure Shows the Revenue and Cost Curves of a Monopolist.Figure

The following figure shows the revenue and cost curves of a monopolist.Figure 11.3
D: Average Revenue
MR: Marginal Revenue
ATC: Average Total Cost
MC: marginal Cost
-Consider the monopolist described in the Figure 11.3. If the firm engages in profit-maximizing behavior, economic profit per unit of output will be:

A) 0.
B) P_2.
C) P₄ minus P_2.
D) P₅ minus P_4.
E) P₅ minus P_1.