Theories of racial superiority were significant in the south because they: select one:
a. fostered slave rebellions among slaves who believed in the inferiority of the planter class.
b. played no role in encouraging white support of slavery.
c. were primarily adhered to by the planter elite that owned slaves.
d. were created by slaves to justify their enslavement.
e. created a sense of unity that bridged class divisions among most southern whites.