11: because more railroads= more supplies moving quicker
12: because if you have more money you can buy more guns and ammo plus Pay more troops
14: Disease and lack of food killed the troops
15: They also had many more troops than the south so even though they lost 100,000 more they could bring more troops faster than the south could
I think that the answer is A but not for sure.
Answer:
Its B because it was clearly written at the time that it was happening.
