Considering the socio-cultural context of the Old Testament, what was the primary theological significance of Ruth's decision to stay with Naomi, beyond familial loyalty?

A It demonstrated the importance of women's roles in maintaining family lineages. B It highlighted the legal rights of widows in ancient Israelite society. C It exemplified a Gentile's voluntary integration into the covenant community of Israel, foreshadowing the inclusion of Gentiles in God's plan of salvation. D It served as a practical solution to Naomi's economic hardship in Bethlehem.