The "Great Migration" of African Americans during World War I was largely caused by
Wartime laws that relaxed Southern control over the movement of African Americans.
OA need for factory workers in the north as white men were shipped overseas.
O The availability of improved railroad lines initially put in place for troop movement.
OA demand by the War Department for the creation of African American military units.

The Great Migration during World War I was driven by the demand for factory workers in the North due to white men being overseas, leading to a significant movement of African Americans seeking job opportunities and to escape racial injustice.

Explanation:

The Great Migration of African Americans during World War I was largely caused by the need for factory workers in the north as white men were shipped overseas. Northern factories recruited Southern black men for work, leading to a significant movement of African Americans to Northern cities for job opportunities and to escape racial injustice.

Learn more about Great Migration during World War I here:

https://brainly.com/question/5605838