Under a market system government has a limited role to play, Thus, D is the correct answer.
Why does the government has the least role to play in the market system?
Majorly, this is because the market mechanism is regulated by the forces of demand and supply. There is no intervention from the government.
In a market economy established by the U. S. Constitution, most economic decisions are made solely by buyers and sellers, and not by the government. Still, the U.S. government's role in the economy is not so important. It includes, most economics believe, responsibility for six major functions.
There is a limited role for government in a market economy. Government provides only certain goods and services, for the maintenance of law and order in the country. These services are paid for by taxes, and include such things as providing for the national defense, protecting the environment, and protecting property rights.
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