All you have to do is rewrite you idea in your hypothesis.
Answer:
Because it does. No other answer. This is one of those Impossible to Answer questions from college.
Many North African nations practice Islam because many Muslims traded in that region, so the North Africans converted to Islam, whereas those in Sub-Saharan African nations were more prone to Christianity because of the trade they did with Europeans.
C goods cuz those e the things that ppl want
Probably because hip-hop is a popular genre of music around the globe and is continued to advertise and spread?