History

Guest

15 November, 11:36

By 1200 C. E., improved agricultural technology had spread throughout much of sub-Saharan Africa primarily through the

A. Development of oxen immune to diseases carries by the tsetse fly

B. Discovery of gold that provided a means of exchange among groups

C. Expansion of the Sahara Desert which forced Berber people's to move south

D. Migration of Bantu speaking peoples with their knowledge of iron working