PEASE QUICK Study the graph. Which statements are true? Check all that apply. Chicago experienced the greatest increase in African American population among Northern cities between 1910 and 1920. New York had the highest population of African Americans in Northern cities in both 1910 and 1920. Detroit had the lowest African American population among Northern cities in both 1910 and 1920. African American populations rose in major Northern cities between 1910 and 1920.