The answers is A! The Qin empire. i took the test and i got it right, so. Hope this helps.
They prevented people from leaving China because the desert were so hard to cross.(ANSWER D) Gobi desert was dangerous and dry, water available was little since oasis were rare. The Taklamakan desert has strorms with whip up frequency The day boils hot while the night freeze cold .In addition it has poisonous snake.
There are 989 days between April 27th, 2014 and January 9, 2017
They traded or killed animals
