The correct answer is - natural selection.
This is a typical case of natural selection, where we have a group of people that have similar physical traits, that are selected and than isolated from any external influence, so with interbreeding they manage to keep their physical traits for generations to come and thus create a population that resembles their initial ancestors.
They weren't making money and no one was using it
He helped the slaves to get away from being slaves.
Answer:
Ok, I suck at Social Studies...but I'll give it a try. I'm very sorry if I get it wrong.
I think that B is the best answer.
Because I did some quick research about both cultures, so I hope it's right.
Explanation: