Answer:
The Black Death
I got that question right on Edgenuity.
Mexico City fell to the United States Forces under the command of General Winfield Scott.
It is D, the ottoman empire. It' not A because the byzantine's were part of the ottoman empire. The Mongols were eastern asia so that wouldn't be it. And the roman empire had already fell by the time the Ottoman empire had rose. So you have your answer! Hope I helped. :)
Blank #1: A
Blank#2: C
Blank#3: C
Blank#4: A
Blank#5: B
1991 - 15 republics formed independent nations
1777, The Treaty of Long Island
HOPE THIS HELPED!!!!! XD