One Possible Benefit of a Monopoly Is

One possible benefit of a monopoly is

A) a more efficient allocation of resources; only one firm is needed to supply quantity demanded.
B) greater opportunities for research due to long-run positive economic profits.
C) the government is better able to ensure that it follows laws and guidelines because there is only one firm to monitor.
D) goods and services are provided at a lower price than under perfect competition because of a monopoly's decreasing average cost curve.