A mixed economy is. Please help me out with this

 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 required for efficiency in free markets, such as equal information and rational market participants, cannot be achieved in practical application.

Explanation:

the answer is d. amendments.

the use of electrical signals that transit messages is know as