Reflecting on the narrative of the bronze serpent in Numbers 21:4-9, what primary theological lesson does it convey regarding God's provision for healing and salvation?

A That physical objects possess inherent magical powers capable of warding off evil. B That obedience to specific rituals is the sole means of obtaining divine favor. C That God can use seemingly unlikely or even offensive means to offer healing and redemption, requiring faith and trust in His provision. D That suffering is always a direct consequence of personal sin and can only be alleviated through self-punishment.