The Diagram Below Shows the Marginal Cost of Abatement for Each

The diagram below shows the marginal cost of abatement for each of two firms,A and B.Each firm is initially abating Q0 units of pollution.
FIGURE 17- 6
-Refer to Figure 17- 6.Suppose that a system of tradable pollution permits is introduced into this market and the equilibrium permit price is p*.The effect will be that

A) there will be no change in the quantity of abatement by each firm.
B) Firms A and B will each abate Q2 units of pollution.
C) Firm A will abate less pollution-the amount Q2,and Firm B will abate more pollution-the amount Q1.
D) Firms A and B will each abate Q0 units of pollution.
E) Firm B will abate less pollution-the amount Q2,and Firm A will abate more pollution-the amount Q1.