Command economies are usually less efficient than market economies because the competition in market economies encourages both quality and low prices. Command economy is an economy in which production, investment, prices, and incomes are determined centrally by a government. The correct answer between all the choices given is the third choice or letter C. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.