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The statement which is true is that the bantu expansion took place over a long period of time.
What is bantu expansion?
The concept behind the Bantu expansion is that the original Proto-Bantu-speaking population, which originated in West-Central Africa and extended across much of sub-Saharan Africa, underwent a significant sequence of migrations. The Proto-Bantu-speaking colonists dispersed or assimilated existing pastoralist and hunter-gatherer populations as they went along. At least two waves of the expansion are thought to have occurred between 3,000 and 2,000 years ago (approximately 1,000 BC to AD 1).
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