Answer:
Option A. Limited medical care led to many deaths by infection.
Step-by-step explanation:
The lack of effective medical care and poor medication resulted in infection growth and gangrene. Most of the deaths were due to infections and gangrene, not by the weapons on the field. Furthermore, smallpox was also one of the major causes of death during the revolutionary war. Hence the option A is correct here.
Option B is incorrect because it was a decisive victory.
Option C is incorrect because the total casualties by weapons during the revolutionary war were at 6,800. So saying 10,000 casualties a day is exagerration.
Option D is incorrect because General George Washington was trying to capture back the fallen cities and thatswhy he shake hands with the french army which gave the american victory. His intentions were not to kill the Union soldiers.