My best guess would be "C"
Answer:
Stalingrad
Explanation:
Hitler rerouted his army leaving a small force to complete the encircling motion and the Russians defended it fiercely.
Black Friday is most associated with Jim Fisk and Jay Gould.
The two greatest factors that contributed to the spread of disease among civil war soldiers were that they were in extremely close quarters, and that there was no medicine that could kill the germs in question.
