How Had the Political Climate Changed in the South During

How had the political climate changed in the South during World War II and in the early Cold War years?

A) The mass exodus of African-Americans for the West Coast and Northeast left the region almost exclusively white.
B) The high concentration of prisoner-of-war camps in the region had made these southerners savvy in foreign affairs.
C) The number of African-Americans in the region that were registered to vote increased sevenfold.
D) In light of the fight against an enemy with a racial ideology, the states of the Upper South abolished segregation and Jim Crow rule.
E) The region's central role in the development of the atomic bomb made it the capital of militant Cold War politics.