In the Pre-Civil War Southern United States, Gatherings of Five

In the pre-Civil War southern United States, gatherings of five or more slaves were forbidden unless a white person was present, because

A) resistance was most likely to be expressed openly when black slaves were provoked by the presence of white persons.
B) resistance is most likely to be expressed openly when people are allowed to assemble.
C) white persons were curious about the use of the story of Moses that was popular among slaves at the time.
D) some whites were eager to join the black slaves in their plans, some successful, in establishing free communities in isolated areas.
E) these whites were actually covert anthropologists eager to study social relations during these politically difficult times.