In which system do buyers and sellers freely interact in markets without governmental interference? 

A)  traditional system 
B)  mixed economic system 
C)  pure free-command system 
D)  pure free-market system

Pure Free-market System

An economic system where transactions are made without government intervention, based solely on the forces of supply and demand.

Mixed Economic System

An economic system that blends aspects of both capitalism and socialism, incorporating both private and government involvement in economic activities.

Traditional System

A social or economic system based on long-standing customs, practices, and traditions, often within specific communities or cultures.