they taught eachother how to read, write do math, they worked on honest and self control.
Hope this helps
i think it is A, D. but tell me if i am wrong.
They had to reinvent their economy because General Shermans tactic of total war. when he did total war, he marched from the north all the way to Atlanta, Georgia and destroyed anything that couldn't be used as food or supplies. so they had to reinvent their economy because the south was totally destroyed