Exhibit 31-3 -Refer to Exhibit 31-3.Suppose That Firms A,B,and C Are the A,B,and

Exhibit 31-3

-Refer to Exhibit 31-3.Suppose that Firms A,B,and C are the only polluters in the state and that each emits 4 tons of pollution into the atmosphere.To cut the level of pollution in half,the government mandates system whereby each firm must reduce its pollution level by one-half.The total cost of complying with the mandate is

A) $433.
B) $1,540.
C) $2,750.
D) $8,570.
E) $11,650.