This answer to this problem is 64
It was called the Jamestown colony
Answer: Mongols did not necessarily need to expand their territories as much as they did. The pull factor for Mongol imperialism is directly related to the push factors. They may have included climactic and geographic issues impacting the nomadic tribes but most likely were due to the Mongols being enthusiastically militaristic.
Improve society and address economic problems
D, mass production was made easier by assembly lines because products could be made faster