Who were the Soldiers of Buffalo? No one knows for sure why, but the soldiers of the all-Black 9th and 10th Cavalry Regiments were dubbed by the Native Americans they met as "buffalo soldiers." One theory asserts that the nickname originated because the thick, curly hair of the soldiers resembled the fur of a buffalo.
The European nations explored America once they got there. They went there because there was so much land and it was a brand new undiscovered continent.
B) The Mediterranean Sea is your best answer.
When it says which Waterway did the Byzantine Empire control, the Mediterranean is the safest answer, as the Empire controls all routes into the Mediterranean Sea (Southern Spain, Northern Africa, Southern Europe, and Middle East), which makes the Mediterranean Sea under Byzantine control.
hope this helps
They constructed cataracts to drain water