There can be numerous challenges but the biggest are sickness, lack of proper food and drink, increase in pollution in the area, and increased death due to these factors, Hope this helped! ^-^
I'm pretty sure it was just A but I could be wrong.
Answer:
Congress Responds
Most moderate Republicans in Congress supported the president's proposal for Reconstruction because they wanted to bring a swift end to the war, but other Republicans feared that the planter aristocracy would be restored and the blacks would be forced back into slavery.
Explanation: