Beyond his role as a judge, what significant act demonstrated Samuel's prophetic authority and marked a transition in Israelite leadership?

A Leading the Israelites in building the Ark of the Covenant. B Negotiating a peace treaty with the Philistines based on economic exchange. C Anointing Saul as the first king of Israel, despite his initial reluctance and the people's rejection of God as their king. D Establishing a permanent system of tithes and offerings to support the Levitical priesthood.