Which of the Following Statements Concerning the Impact of Islam

Which of the following statements concerning the impact of Islam on sub-Saharan Africa is most accurate?

A) Islam cut off north Africa from the regions of sub-Saharan Africa.
B) Although Africa had never been totally isolated from the Mediterranean, the spread of Islam brought large areas of Africa within the global community.
C) With the conversion of regions of the continent to Islam, Africa became the center of the Islamic world.
D) Despite widespread conversion of Africans to Islam, the continent remained outside the trading sphere of the Islamic world.