Answer:
Correct answer is с. creating the caste system.
Step-by-step explanation:
C is the correct answer developed a caste system that exists in India even today. According to it there are five castes in India - Brahmins (priests), Kshatriyas (warriors ), Vaisyas (merchants, peasants), Sudras (landless peasants and servants ) Pariahs (the lowest layer ).
A is not correct as religion in India developed, and many religions emerged there - Brahmanism, Buddhism, Hinduism...
B is not correct as they brought Sanskrit with them, while D is not correct because Mohenjo-Daro was built by Indus civilization, not Aryans.