Sickness was a big thing brought from there as we were not used to there sicknesses and we were not used to there's it's a lot like the Aztecs and the Spanish the Spanish brought small pocks
Throughout the Ming dynasty, there was a war between the Mongolian tribes. So in order to keep them out and defend their territory, the emperors of the Ming dynasty used alot of their fortune to keep things stable against invasions from the Mongolians. <span />
Starting in the mid 1800s, hoards of people traveled to the west out of desire to find land, and there was offered land under the Homestead Act. This was a series of acts that was passed in the year 1862 and it offered 160 acres of land to the settlers. I hope the answer helps you.
C would be the answer. The Silk Road was an ancient network of trade routes that were for centuries central to cultural interaction and trading.
The difference is 100 years there were 6 units and today there are 3,200 units. I hope this helps you :]<span />