Answer:
A. migration of African Americans from southern farms to northern factories.
Explanation:
African Americans wanted to escape poverty, lack of opportunities and discrimination in the South. Industralization and growing urbanization in the northern states gave them new opportunities and hopes of a better life.
North Africa was important to the invaders because of the food and trade source. The correct option among all the options given in the question is option "B". North Africa was a valuable trade route for slaves and exchanging salts and gold. This importance of the trade route attracted many invaders to invade North Africa.
C. Its government wants to control outside influences that may affect its people.