Suppose There Are Three Power-Generating Plants, Each of Which Has

Multiple Choice

Suppose there are three power-generating plants, each of which has access to 5 different production processes. The table below summarizes the cost of each production process and the corresponding number of tons of smoke emitted each.  
It would cost Firm X ________ to reduce emissions by one ton if it currently emits 3 tons, and ________ to reduce emissions by one ton if it currently emits 2 tons.

A) $14; $25
B) $14; $16
C) $16; $25
D) $30; $55