Answer:
First question: the given statement is false.
Second question: options a and c are correct.
Explanation:
If a society whishes to reduce overall pollution by a certain amount, then it is efficient when different firms reduce pollution by different amounts. This is because the cost of reducing pollution differs across the firms.
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The CAC policy is inefficient because they rely on mandated uniform reductions. A firm will not reduce emissions more than the mandated amount because there is no incentive to do so. Since, the reductions are uniform, it is not able to target the firms that require bigger reductions.