Which Statement Best Expresses the Mobility of African-Americans During the 1930s

Which statement best expresses the mobility of African-Americans during the 1930s?

A) African-Americans poured into northern cities in a "great migration" in search of employment.
B) African-Americans poured into southern cities in record numbers in search of employment.
C) The depression slowed down the migration of African-Americans northward.
D) African-Americans reversed their previous migrations to northern cities, and returned to southern farms where there were greater opportunities for survival.
E) The depression made little difference because the majority of African-Americans had migrated to northern cities earlier in the century.