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.
The answer is b and it is shown by What they said
Francis Cabot Lowell and Samuel Slater both <span>imported technological advances from Great Britain.</span>
1,994 miles from Standish, Michigan to Arizona. Google it is my advice because here probably isn't Standish, Michigan. Here at the current moment for me is though. I can google it if you tell me where.