Answer:
D. A monopoly that results when one firm is able to produce at a lower cost than multiple firms, giving large firms with higher levels of output an advantage over smaller competitors.
A. Municipal Power Light, the local supplier of electricity.
Explanation: A natural monopoly is a monopoly enjoyed by a firm due to its large nature through which it is able to enjoy Economies of scale and produce at a reduced cost which other companies are unable to meet up with.
WITH A NATURAL MONOPOLY, A FIRM HAS A CONTROL OVER THE PRICE OF THE PRODUCT PRODUCED AND SERVICE RENDERED AS THERE ARE NO CLOSE SUBSTITUTE.
The municipal Power light, the local supply of power is an example of a firm that can enjoy Natural monopoly.