Which statement best identifies the slave trade that existed, in Africa prior to the arrival of Europeans?

Question

Rural villages were emptied, and it’s enslaved people moved to the cities
Enslaved people were captives from local ethnic conflicts who are traded
The Ashante would steal workers from the Kongolese kingdom
Enslaved people were taken forcefully by raids in the middle of the night

Answer 1

The statement "Enslaved people were taken forcefully by raids in the middle of the night" best identifies the slave trade that existed in Africa prior to the arrival of Europeans.