I can only answer the first one, so
D) all of the above
The Qin fled south when they were defeated by the Huns.
There is a total of 538 , 144 of them are black
The ships were built well but they cramp packed the slaves in the hull of the ship so if one person was sick the rest did too
In the late 1800s, American cities suffered from serious environmental pollution due to the smokestack emissions from hydroelectric power plants. The correct answer is D.
