How does the story of Ruth, a Moabite woman, challenge the conventional understanding of Israelite identity and God's covenant in the Old Testament?

A It highlights the importance of military strength in maintaining Israel's borders. B It demonstrates that faithfulness to God and loyalty to family transcend ethnic and national boundaries, leading to inclusion in the lineage of David and ultimately Jesus. C It emphasizes the need for strict adherence to dietary laws to maintain purity. D It advocates for the complete separation of Israelites from foreign cultures to prevent idolatry.