On which crop did the early bantu greatly rely? wheat sorghum soybeans maize

The correct answer is Sorghum

Sorghum was a big part of African history because various types were grown both for human and for animal consumption. It's popularity dropped over time and although it's still eaten nowadays, the amount of it is nowhere near to where it was during the Bantu migrations and developing African settlements in history.

The answer is a)advocates of divine right.