Vì sao Liên Bang Nga đang tích cực thúc đẩy phát triển kinh tế vùng Viễn Đông những năm gần đây?

The caste system in india was used for what purpose? a) to ensure that all people had an adequate income b) to prevent the rich from taking too much power c) to provide social control and conformity according to one’s birth d) to draft a military capable of defending india from mongol invasion