I need help ASAP if that’s okay but take your time but it’s due in a hour so help me please and thank you! I will give brainlest!

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