Central planning is a key characteristic of which economic system? a. free market b. command and control c. price system d. mixed economic system

The answer is letter B. Command and Control. Central planning is based to as a planned economy, it is an economic system in which the state or government makes economic decisions rather than the interaction between consumers and businesses. Command and Control set specific limits for pollution emissions and/or mandates that specific pollution-control technologies that must be used.

Central planning is a key characteristic of command and control economic systems, which is an economic system that directly regulates industries and activities through legislation which states that which is permitted and what which is illegal. Thus the answer is B. command and control.

I might be wrong but i think the third one