What Was the Most Common Means of Acquiring Slaves to Work

What was the most common means of acquiring slaves to work on newly established cotton plantations in the Lower South?

A) illegally importing them from the West Indies
B) through births to existing slaves
C) capturing and returning to slavery communities of escaped slaves in Florida
D) purchasing them from Spanish landowners in the territory that would become Texas
E) purchasing them at auction in cities such as Mobile, Natchez, and New Orleans