After World War 1 which factor was the MAJOR cause of the migration of many African Americans to the North A) the start of the Harlem Renaissance B) Federal Government job-training programs C) increas?

The major cause of the migration of many African Americans to the North after World War I was C) increased job opportunities in Northern industrial cities. The demand for labor during the war created vacancies as soldiers returned home, prompting many African Americans to seek better economic prospects and escape the oppressive conditions of the Jim Crow South. This migration significantly contributed to the cultural and social transformations seen in Northern cities, including the Harlem Renaissance.