If the bantu established their homeland in 2000 bc approximately how many years ago did this event happen? a)4,017 years ago b)2,017 years ago c)17 years ago

The Bantu established their homeland in 2000 BC approximately if we're talking about it now, it would already be 4,017 years ago. BC means Before Christ (or BCE, Before Common Era, disregarding religious influence), which indicates a counting of approximately 2000 years ago as 1 BC. In this case, it's 2000 BCE so add another 2000 years.