Concept:Sovereignty as a supreme, perpetual, and indivisible authority.Explanation:Jean Bodin, a French jurist, first popularized the modern theory of sovereignty in his work Les Six Livres de la République (1576).He defined sovereignty as the absolute and permanent power of a state.This power includes making laws without needing the consent of any superior or equal.Bodin’s ideas shaped modern understanding of state authority and influenced later political thinkers.Answer:C. Jean Bodin