How Did the Lower South Acquire the Slaves It Used

How did the Lower South acquire the slaves it used after 1808?

A) It continued to import slaves from Africa.
B) It bought them from plantation owners in the Caribbean.
C) It established breeding centers in northwestern Georgia.
D) It acquired most of its slaves from the Upper South.
E) It arranged for the passage of Africans as indentured servants and then forced them into slavery.