B. Discrimination in employment based on race was banned.
This is not the right app for this
Like many nomadic pastoral cultures, the Mongols had a segmentary society, originally organized into a hierarchy of families, clans, tribes, and confederations. While social classes including nobility, herders, artisans, and slaves existed, the social structure was not completely rigid and social mobility was possible.
I am going to say 1 because it started 2.5 billion years ago and is still hapinung today
