Suppose that there is only one provider of a service in a state. Because this provider experiences economies of scale, the government does not want to break it into smaller pieces, but it does want the provider to supply the efficient quantity. Which of the following policy options might most effectively enable the government to achieve its objectives in this situation?a. Regulate the firm's pricing behavior.
b. Do nothing at all.
c. Turn the company into a public enterprise.
d. Use antitrust laws to increase competition.

Monopoly is the market structure in which there is a single seller of the product and service. And the seller enjoys the freedom and does not have any competition in the market.

So, this is the case of a monopoly market structure as there is only single seller in the state. And the government regulate the monopolies so that could protect the interest of customers and adopt the policies such as merger regulations, competition in market and breaking down the monopoly.

Therefore, the government could control the prices by price capping, in which the government set the limit on the prices of the service. And in the case of monopolies have the power set the prices above the equilibrium level. Hence, it is required to regulate the price.