Which group of trading peoples spread Islam to West Africa and what two major items did they trade with west Africans?

North African traders were major actors in introducing Islam into West Africa. Several major trade routes connected Africa below the Sahara with the Mediterranean ... proselytizing, believing that God would bring people around to Islam in his own ways. ... It was a multi-ethnic state with various religious and cultural groups.

i smell fart because the kid next to me smells bad

increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b