Beyond the well-known narrative of David and Goliath, what crucial theological point is emphasized in 1 Samuel 17 regarding Israel's reliance on God for victory?

A The importance of physical strength and military prowess in overcoming enemies. B The necessity of having the latest weaponry to ensure success in battle. C The assurance that God delivers His people not through human might, but through divine power. D The idea that victory is solely dependent on the bravery and skill of individual warriors.