My best guess would be either A or\and E
I think that maybe people are saying different answers because there might have been many such laws. I will mention one example: the Diversity Visa Immigration: it means that people from Eastern Europe have a higher change of obtaining a visa due to a smaller population in the US than the western European Countries.
A. Enlightenment
The caste system is exclusive to Hinduism in this case, Hinduism did not have one founder, and neither Buddhism or Hinduism sought to actively convert people into their religions. Both Hinduism and Buddhism, however, believed in rebirth and eventual enlightenment.
