The North's factories could be considered an advantage primarily because:
2. The factories could be converted to making supplies for the army.
During the Civil War, the North had a well-established industrial base that allowed for the rapid production of weapons, ammunition, uniforms, and other military supplies necessary for the war effort. This capacity greatly enhanced the North's ability to equip and sustain its armies compared to the South, which had fewer manufacturing facilities. While the other options present interesting points, the ability to pivot toward military production was a crucial strategic advantage during the conflict.