Answer:
Last one "able to live on their lands" because the people who came from ships stayed on and lived on there land without the Indians approval.
We know so much about how many africans were enslaved and where they went because of the ships records as well as port records. Also sold slaves came with documentation in some areas.
If a country has a change in exchange rates such as rising up the flow of passengers may be affected, plus more likely to attract fewer Inbound visitors.
