What happens when a country has a mixed economy

A mixed economic system is a system that combines aspects of both capitalism and socialism. A mixed economic system protects private property and allows a level of economic freedom in the use of capital, but also allows for governments to interfere in economic activities in order to achieve social aims. According to neoclassical theory, mixed economies are less efficient than pure free markets, but proponents of government interventions argue that the base conditions such as equal information and rational market participants cannot be achieved in practical application.

Between a mixed and a command the only difference is that the government is either partly involved or 100% involved.

Your 2nd answer is D I believe