What Role Did White Southerners Think That Free Blacks Played

What role did white southerners think that free blacks played in slave revolts?

A) White southerners thought that free blacks were incapable of independent thought, and therefore would not have a role in revolts.
B) White southerners thought that free blacks were an extremely dangerous element, and responsible for inciting slaves to rebellion.
C) White southerners mainly thought that foreigners, not free blacks, had the main role in slave revolts.
D) White southerners thought that free blacks played a minimal role, since they realized that slaves were unhappy in slavery and would try to get out of it.