Why did african americans move to the far west?

The Great Migration, sometimes known as the Great Northward Migration, or the Black Migration, was the movement of six million African Americans out of the rural Southern United States to the urban Northeast, Midwest, and West that occurred between 1916 and 1970. In every U.S. Census prior to 1910, more than 90 percent of the African-American population lived in the American South. In 1900, only one-fifth of African Americans living in the South were living in urban areas. By the end of the Great Migration, just over 50 percent of the African-American population remained in the South, while a little less than 50 percent lived in the North and West, and the African-American population had become highly urbanized. By 1960, of those African Americans still living in the South, half now lived in urban areas, and by 1970, more than 80 percent of African Americans nationwide lived in cities.

the navigation act prevented the colonies from exporting to countries other than britain and it prevented the importation of goods by other countries as well. so i believe the correct answer is d. other nations could not deliver goods to the colonies.

hope this .

d. it adversely affected american productivity