Considering the cultural context of ancient Israel, what was the primary significance of the act of Boaz redeeming Ruth in the book of Ruth?

A It primarily demonstrated Boaz's wealth and social standing within the community. B It fulfilled the Levirate marriage law, ensuring the continuation of Elimelech's family line and providing security for Naomi. C It was mainly a romantic gesture, showcasing Boaz's affection for Ruth, a Moabite widow. D It primarily served to integrate Ruth, a foreigner, into Israelite society and customs.