The Sahel is an area in Africa just south of the Sahara Desert. In this semi-arid region, mud bricks are often the easiest building material one can obtain. This building style reflects the way people
A. in Africa were heavily influenced by European architecture.
B. make modern buildings look older to trick tourists.
C. in Africa did not know how to build houses made of wood.
D. make use of the most available resources in the area.