Beyond the immediate deliverance of the Israelites, what primary theological purpose did the series of plagues inflicted upon Egypt serve, as evidenced in Exodus?

A To demonstrate the superior military might of the Israelites compared to the Egyptians. B To establish Moses as the sole leader of the Israelite people. C To reveal Yahweh's power and sovereignty over all gods and creation, discrediting the Egyptian pantheon. D To economically cripple Egypt, paving the way for the Israelite conquest of the land.