Answer: Not change the amount of pollution reduction because the marginal benefit and marginal cost of pollution reduction will not change.
Step-by-step explanation:
Externality exits when one persons action affects others who are not engaged in the activity. In such situations the optimal amount of the good (externality) is determined at the point where the marginal benefit is equal to the marginal cost. When the utility is made liable for the damages it does not affect the marginal benefit or marginal cost of pollution reduction. Thus, making the utility legally liable will not change the amount of pollution reduction because the marginal benefit and marginal cost of pollution reduction will not change.