Historians have argued that all of the following were causes of the Civil War EXCEPT
(A) the clash of economic interests between agrarian and industrializing regions
(B) the actions of irresponsible politicians and agitators in the North and the South
(C) differences over the morality and future of slavery
(D) the growing power of poor Southern Whites who resisted planter dominance and sought to abolish slavery
(E) a constitutional crisis pitting states’ rights against federal power