What Was the Great Migration

What was the Great Migration?

A) the movement of women to cities around the country to take the jobs vacated by men off to war
B) the immigration of much of the American Expeditionary Force to Europe after the war
C) the transition of Mexican Americans from farm labor to industrial jobs in southwestern cities
D) the movement of southern African Americans to the North and West during the war
E) the massive influx of immigrants to the United States early in the war