***2 Ports A historian notes that many African Americans moved from southern rural areas of the United States to large urban centers farther north between 1910 and 1930. He hypothesizes that the availability of high wages in northern factories was the fundamental cause of this population shift. Which two themes would this historian focus on as he researches his hypothesis?
While WW1 was happening more opportunity at the factories had started so African Americans migrated north to these industrial cities. Also due to more factory workers fighting in ww1 demand for workers were needed
