Considering the socio-cultural context of the Old Testament, what was the primary significance of Boaz's actions toward Ruth in the book of Ruth, beyond simple kindness?

A It primarily demonstrated his wealth and social status within the community. B It fulfilled the responsibility of a kinsman-redeemer, ensuring the continuation of Naomi's deceased husband's family line and the inheritance of their land. C It was mainly a personal expression of romantic interest and attraction towards Ruth. D It was solely motivated by his desire to gain favor with the elders of Bethlehem.