What type of traditional authority is based on rule by the oldest and most experienced?

A) primary patriarchalism
B) patrimonialism
C) feudalism
D) gerontocracy

Gerontocracy is a form of traditional authority where those who are oldest and most experienced are given the power to rule. This could be based on cultural or familial norms that value age and wisdom, or it could be based on the practical experience that comes with years of leadership. Patrimonialism refers to a system of governance where the ruler has complete control over all aspects of society, and feudalism is a medieval system of land ownership and service that was based on obligations between lords and vassals. Primary patriarchalism is not a recognized form of traditional authority.