Can someone answer these questions in full sentences? im also giving away 2 apple gift cards so if you help me ill probably give it to you since i dont need it!

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