Which of the following best describes the united states?

a)it has a market economy with no government regulation. this is the only system that can work with a government run by the people.
b)it has a command economy. a large nation like the united states needs the government to control all growth of business to prevent problems.
c)it has a traditional economy. most communities are focused on providing their own needs with the resources available in the local area.
d)it has a mixed economy. the government protects individual rights, such as minimum pay for work and choices in goods and services.