First one to answer get brainlist

Which of the following statements best describes Africa’s coastal and inland societies?

Select the best answer from the choices provided.

A.
They were unified into large kingdoms with similar values and customs.
B.
They were made up of many small tribes with vastly different values and customs.
C.
They were grouped into small tribes but all had similar values and customs.
D.
They were unified into one large kingdom, but people within them had vastly different values and customs.