Answer:
B
Explanation:
They thought it was safer to live in the desert so B would make sense
They keep discount rates, I believe.
North Africa is separated from Subsaharan Africa by the African Transition Zone, a transitional area between Islamic-dominated North Africa and animist- and Christian-dominated Subsaharan Africa. It is also a transition between the Sahara Desert and the tropical type A climates of Africa's equatorial region.