Which MOST contributed to why African Americans made the Great Migration from the southern United States to the northern United States during the years of World War I? A African Americans moved north because they felt their chances of being conscripted into the army would be better in the northern United States. B African Americans moved north to become strikebreakers when union members in defense manufacturing plants elected to walk out and to go on strike. C African Americans moved north in order to work in the defense manufacturing factories, which could no longer use immigrants as the main source of labor. D African Americans moved north because Southern farmers eliminated their jobs in the South in order to use what was once farmland to develop defense manufacturing plants.