Answer:
D. Some restrictions on business ownership and business activity.
Step-by-step explanation:
The United States worked under an economy or free enterprise system, which allows any person or group of people to start and operate a business with minimum government regulations or interference.
Free enterprise economies allow people to be creative and produce at their own will, contrary to other market economies, such as socialist or communist.
Although free enterprise economies work alone with little government intervention, it intervenes if antitrust laws are violated or when natural resources are limited.