Answer:
The market structures that can exist in a free-market system are:
A. Oligopoly
D. Pure competition
E. Monopolistic competition
Step-by-step explanation:
In a free-market system, multiple market structures can coexist. Oligopoly refers to a market structure in which a few large firms dominate the market.
Pure competition refers to a market structure where there are many small firms selling homogeneous products. Monopolistic competition refers to a market structure with many firms selling differentiated products.
Government planning and Communism are not market structures that exist in a free-market system. Government planning refers to an economic system where the government determines production and allocation decisions, which is contrary to the principles of a free-market system.
Communism, on the other hand, is a socioeconomic ideology that advocates for the collective ownership of resources and the absence of private property rights, which also does not align with a free-market system.