The marginal external cost associated with air pollution increases with the annual output of a polluting industry. At the current competitive equilibrium level of output per year, the marginal external cost is $10 per unit of output. To achieve efficiency, a. a corrective tax of $10 per unit of output is required.
b. a corrective tax of more than $10 per unit of output is required.
c. a corrective tax of less than $10 per unit of output is required.
d. a corrective subsidy of $10 per unit of output is required.
e. a corrective subsidy of less than $10 per unit of output is required .

The answer is "Option c".

Explanation:

The Marginal external cost, owing only to the production of an extra unit of goods or services, is the cost changes for persons besides the producer or buyer of goods or services. In this, question the  "option c" is right in, this regard because it needs a correction tax of less than $10 per unit of production.

answer; ///i believe that the correct answer is (d) ///all of the

(a) when insurance is obtained through a reciprocal insurer, the insureds are sharing the risk of loss with other subscribers of that reciprocal.

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