5. 다음 글의 내용과 일치하는 것은?
The most notorious case of imported labor is of course the Atlantic slave trade, which brought as many as ten million enslaved Africans to the New World to work the plantations. But although the Europeans may have practiced slavery on the largest scale, they were by no means the only people to bring slaves into their communities: earlier, the ancient Egyptians used slave labor to build their pyramids, early Arab explorers were often also slave traders, and Arabic slavery continued into the twentieth century and indeed still continues in a few places. In the Americas some native tribes enslaved members of other tribes, and slavery was also an institution in many African nations, especially before the colonial period.
- 1African laborers voluntarily moved to the New World.

- 2Europeans were the first people to use slave labor.

- 3Arabic slavery no longer exists in any form.

- 4Slavery existed even in African countries.
