Why were slave owners particularly concerned by any unsupervised meeti

Why were slave owners particularly concerned by any unsupervised meeting including ones for religious purposes?

A) Slave owners believed religious worship by slaves would significantly reduce their labor productivity on the plantations.
B) Slave owners were fearful these collective meetings could be inspirations for planning violent slave revolts.
C) Slave owners did not believe slaves could derive any spiritual or educational benefit from Christian religious worship.
D) Slave owners believed that they had a superior understanding of the Bible and Christian religious principles than any black preachers leading unsupervised religious meetings of slaves.

ANSWER
Answer: B