What is one necessary role of government in a market economy?

Question

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In a market economy, property rights are essential for the functioning of the market. The government has a role in enforcing property rights to ensure that individuals and businesses can confidently own and exchange property without fear of theft or other violations. This helps to create a stable and predictable environment for businesses and consumers to operate in, which is essential for the market to work efficiently. A, B, and C are all possible roles of government in an economy, but they are not necessarily necessary in a market economy.

What Is One Necessary Role of Government in a Market