Which of the following is a factor that historians believe contributed to the North's victory during the Civil War?
A.the greater presence of industry in the NorthB.the South's use of slaves as a main source of laborC.the large amounts of foreign aid received by the NorthD.the disruption to agricultural production in the South
A.the greater presence of industry in the NorthB.the South's use of slaves as a main source of laborC.the large amounts of foreign aid received by the NorthD.the disruption to agricultural production in the South