During the Period Known as the "Great Migration" (1919-1970)

During the period known as the "Great Migration" (1919-1970) :

A) Americans of all races explored and settled the American West.
B) businesses moved from U.S. and Western European countries into the displaced southern countries where labor was cheaper.
C) Six million African Americans migrated out of the South to the North and West of the U.S.
D) Thirty-three million immigrants were absorbed into mainstream U.S. culture coming from diverse cultures.