Which of the following was a continuing challenge to the confederacy during the civil war

Two things that challenged the confederacy were diseases and population disadvantage. 
Diseases challenged both sides and killed more soldiers than the battles themselves. 
The other challenge was that the North has more soldiers, because the North has more people. So the Confederates were outnumbered. 
Hope this helps! Have a great day!

Where's the table ? can you take a pic ?