Answer:
Because they pretty much did the opposite of any modern civilization. While others focused on farming and staying put, the mongols went everywhere. That was one of the many ways that they were different, but what interests people the most is that they succeeded while others failed, and they became significant because they demonstrated that there is more than one way to thrive.
I hope that helps! :)
Answer:
Long staple cotton was profitable because the cotton fibers could be easily separated from the seeds. ... While reducing the number of slaves needed to grow cotton the cotton gin greatly increased the areas where cotton could be profitably grown. This increased the demand for slaves.
The answer is (A.) Department of State.
For more information, see https://www.state.gov/r/pa/ei/rls/dos/436.htm