Use the Figure Below to Answer the Following Questions

Multiple Choice

Use the figure below to answer the following questions. Figure 15.2.1
-Refer to Figure 15.2.1.The figure shows the marginal private cost curve,the marginal social cost curve and the market demand curve of a mining firm.If a constant per unit tax is imposed that generates an efficient allocation of resources,then consumers pay a per unit price of

A) P₃ - P₁.
B) P₁.
C) P₂.
D) P₃.
E) P₄.