This Table Contains Data on the Social Costs and Benefits

Multiple Choice

This table contains data on the social costs and benefits incurred in improving water quality in a lake.Complete the table and answer the question(s) below.
Table 9.1-Costs of reducing water pollution
-According to the schedule presented in Table 9.1,which rate of pollution is optimal?

A) 50 PPM
B) 35 PPM
C) 25 PPM
D) 10 PPM