Answer:
All options apply
Explanation:
i) The government can establish antitrust laws to increase market competition.
ii) The government can set rules that regulate the behavior of monopolies, e.g. setting price ceilings
iii) Some natural private monopolies can be bought by the government (usually local or regional) and turned into public companies, e.g. utilities
iv) The government can simply do nothing at all and hope that the market will by itself correct this issue when new competitors enter the market, e.g. Microsoft