What was the primary reason many african americans migrated to the north both doing and after world war i

More economic opportunities were present in the North.

The migration changed the demographics of the South. ... By 1970, more than 10.6 million African Americans lived outside the South, 47 percent of the nation's total. Because the migrants concentrated in the big cities of the north and west, their influence was magnified in those places.

a.) a poor farmer, due to the fact that they would want to be freed from british rule.

islam spread slowly through much of africa through trade and preaching.