Considering the socio-political context of the divided kingdom of Israel, what was the most significant impact of Queen Athaliah's reign in Judah (2 Kings 11)?

A She solidified the alliance between Judah and Phoenicia through trade agreements, bringing economic prosperity. B She successfully eradicated Baal worship from Judah, restoring the exclusive worship of Yahweh. C She nearly extinguished the Davidic line, threatening the messianic promise and the continuity of God's covenant. D She implemented a new legal code based on Assyrian law, modernizing the judicial system of Judah.