Beyond his role as a judge, what was the primary significance of Samuel anointing both Saul and David as kings of Israel?

A It solely established a hereditary monarchy in Israel. B It demonstrated God's ultimate authority in choosing Israel's leaders and initiating a shift from the rule of judges to a centralized kingdom. C It proved Samuel's personal power and influence over the Israelite tribes. D It was simply a political maneuver to unite the northern and southern tribes.