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.Process(smoke/day) A(4 tons/day) B(3 tons/day) C(2 tons/day) D(1 ton/day) E(0 tons/day) Cost to Firm X ($/day) $500$514$530$555$585 Cost to Firm Y ($/day) $400$420$445$480 $520Cost to Firm z ($/day) $300$325$360$400 $550Suppose the government imposes a tax of $21 on each ton of smoke emitted. To minimize costs, Firm X will emit ________ tons; Firm Y will emit ________ tons, and Firm Z will emit ________ tons.
A. 1; 2; 4
B. 3; 4; 4
C. 1; 2; 3
D. 2; 3; 4
Answer: D
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