Two Firms, Acme and FirmCo, Have Access to Five Production

Multiple Choice

Two firms, Acme and FirmCo, have access to five production processes, each of which has a different cost and gives off a different amount of pollution. The daily costs of the processes and the corresponding number of tons of smoke emitted are shown in the table below.  
If pollution is unregulated, the two firms will produce using process ________, and a total of ________ tons of smoke will be emitted each day.

A) C; 12
B) D; 4
C) B; 16
D) A; 20