Which Identifies a Key Reason for the South's Defeat in the Civil

Which identifies a key reason for the South's defeat in the Civil War?

A) The Confederacy lacked a single competent general to lead its troops.
B) Southern planters were reluctant to start growing food crops instead of cash crops.
C) Confederate armies lacked the conviction to fight a prolonged war with the North.
D) The South was too industrialized to adapt well to a wartime economy.
E) The northern troops were better individual soldiers than Confederate troops.