Answer:
The African states' government betrayed their people. In order to thrive knowing that they could lose land if the British strike them, they gave their people away in return for guns and weaponry. Some states fought back and most lost. Others complied with the British orders and gave them slaves.
C. Divine theory
Or more specifically, the divine-right theory (since the divine theory only establishes that an action's morality and rightness is derived from god, whereas the divine right theory argues that a king is given the right to rule by a god).
I'm pretty sure it was St Jerome