This Diagram Shows the Costs Incurred by Firm a and Firm

Multiple Choice

This diagram shows the costs incurred by firm A and firm B as they reduce the pollution from their factories.MACA represents the marginal abatement cost for firm A and MACB represents the marginal abatement cost for firm B.
-Refer to the diagram above.Suppose that the government imposes a tax of $200 per tonne of pollution per day.As a result,firm A will reduce pollution by _______ tonne(s) per day and firm B will reduce pollution by _________ tonne(s) per day.

A) 1;3
B) 3;1
C) 2;6
D) 6;2
E) 3;3