The great northern migration of african americans occurred in the:

a. 1850s
b. 1870s
c. 1920s
d. 1930s

ANSWER:

Great Northern Migration of African Americans occurred in 1920s.

EXPLANATION:

The movement consisted of African American which were in 6 million. The migration took place from rural "Southern United States" to the urban Northwest, Midwest and west. It is believed that The Great Northern Migration of "African Americans" took place from "1916 to 1970".This movement was recognized as the huge and most rapid movement of mass.  In every U.S. Census before  1910, more than "90%" of the "African-American population" lived in the American South.

The answer is d) rift

Iwould choose c or d