What impact did islam have on west africa?

Between 1000 and 1700, islam caused west Africa to experience an increase in trade and economic activities, the rise and fall of several Islamic states and empires, and provided new practices tobe blended with traditional African culture

"a shortage of traditional labor created new opportunities in the workplace. a major cause of the internment of japanese americans during world war ii was. racial prejudice. in the early 1940's, the "destroyers-for-military-bases deal" with great britain and the lend-lease act were evidence that the united states."

i would think the answer is between b and d i would say d sorry if wrong