Considering the cultural context of ancient Israel, what was the primary significance of 'gleaning,' as exemplified by Ruth in the Book of Ruth?

A It was a common practice for wealthy landowners to test the humility of poor people. B It was a legal provision designed to ensure the poor had access to food, reflecting God's concern for social justice and provision for the vulnerable. C It was primarily a symbolic act demonstrating the landowner's generosity and compassion. D It was a method for landowners to reduce waste and ensure all crops were harvested efficiently.