Table 10-5 the Following Table Shows the Marginal Costs for Each of Each

Multiple Choice

Table 10-5
The following table shows the marginal costs for each of four firms (A, B, C, and D) to eliminate units of pollution from their production processes. For example, for Firm A to eliminate one unit of pollution, it would cost $54, and for Firm A to eliminate a second unit of pollution it would cost an additional $67.
-Refer to Table 10-5. If the government charged a fee of $84 per unit of pollution, how many units of pollution would the firms eliminate altogether?

A) 7
B) 8
C) 9
D) 10