Considering the cultural context of ancient Israel, what was the primary significance of Boaz's act of redemption towards Ruth?

A It primarily demonstrated his personal wealth and generosity. B It fulfilled the levirate marriage law, ensuring the continuation of Naomi's deceased husband's family line and preserving their inheritance. C It was solely a demonstration of Boaz's romantic interest in Ruth. D It was intended to establish Boaz as a future leader in Bethlehem.