Considering the cultural context of the Old Testament, what was the primary social significance of 'gleaning,' as exemplified by Ruth in the Book of Ruth?

A It was solely a means for wealthy landowners to demonstrate their piety. B It primarily served as a method for efficient harvesting, maximizing crop yields. C It was a divinely ordained provision designed to ensure the poor and marginalized had access to sustenance and social inclusion. D It was a common practice allowing anyone to take crops left in the fields, regardless of their social status.