Which of the following best describes the economic system found in the united states?

The answer is the "Mixed market economy".

Explanation:

In the given question some information is missing, that is the option of the question, which can be described as follows:  

a. Mixed market economy

b. Market economy

c. Socialism economy

d. Planned economy

It is an economic system, which includes market, commands and conventional economy characteristics. This enables costs to be dictated by the capitalist market as well as the basic market rules. It is the inspiration, that is motivated by a person's self-interest, and other choices were wrong which can be described as follow:

answer; by working independently, the states have a high likelihood of developing innovative solutions that can be employed in other states;

d.) continue to rise rapidly