Answer:
c
Explanation:
A monopoly is when there is only one firm operating in an industry. there are usually high barriers to entry of firms.
A natural monopoly occurs due to the high start-up costs or a large economies of scale.
Natural monopolies are usually the only company providing a service in a particular region
College bookstores are not monopolies. they do not have high barriers of entry into the industry. start up cost isn't extremely high.
