Final answer:
A natural monopoly has high barriers to entry for new competitors and low production costs for new entrants.
Step-by-step explanation:
In the case of a natural monopoly, the correct statements are:
- High barriers to entry for new competitors: Natural monopolies often have high barriers to entry, which can include large initial investments, exclusive access to resources, or legal restrictions.
- Low production costs for new entrants: Due to economies of scale, a natural monopoly can produce at a lower cost than multiple firms.
Therefore, options A and C are true statements about a natural monopoly.