The use of tribes and clans as a governing institution followed family as a governing institution.
Answer: Option C
Step-by-step explanation:
In many parts of the world even today people live in tribes and clans. They govern their people and outside politics or economy has no role to play in their lives.
Essentially family is smallest governing unit in any system where the eldest person of the family is the highest authority and decides all the issues of the family.
Same is true with the governing system of tribes and clans as the usually they have single person or a group of people or council of elders who govern the people of the tribe.