I think it is A for they formed a group to fight the whites.
Answer:
The Mongol dynasty's relation to Islam, in particular, had tremendous impact on China's relations with the outside world. ... They recruited a number of Persian doctors to China to establish an Office for Muslim Medicine, and the result was even greater contact between West Asia and East Asia.
Explanation:
I believe the answer is: D. There are three economic classes: the rich, the poor, and the middle class.
The separation between these classes is based on their ownership of wealth&resources. The poor are those who barely have enough resources to keep living,
The middle class are those who can comfortably fulfil their basic needs while having a little bit of surplus that they can put into saving , while the Rich are those who had abundance of wealth & resources, to the point where they would not able to spend it in their lifetime.
Someone who runs a successful business but has some robber Barron qualities. A robber Barron will do anything to get to the top