The Bantu migrated to East Africa and displaced other tribes. Option B is correct.
The Bantu expansion constitutes a significant series of migrations of the original proto-Bantu language speaking group, who expanded from an their place of origin around West Africa-Central Africa across much of sub-Saharan Africa. In the process, the Proto-Bantu-speaking settlers displaced pre-existing hunter-gatherer as well as pastoralist groups that they encountered.