Question

One major role that the government plays in the market economy of the u.s. is: requiring minimum levels of employment in major industries setting production targets for major industries allocating resources in various market activities setting laws governing economic activity

Answer 1

One major role that the government plays in the market economy of the u.s. is:  setting laws governing economic activity
The only purpose for a government in a market economy is to make sure that all the people in that country are competing FAIRLY. They could do this by creating some taxation, export/import, and quality regulations