Select the correct answer from each drop-down menu. There are four main types of economic systems in use today.

In a economy, supply and demand dictate production, distribution, and investment decisions.
A. market
B. mixed
C. command
D. traditional
Finally, a combination of market and command systems is found in a economy, in which free markets exist with some government intervention.
A. mixed
B. command
C. traditional
D. market