What was one reason that nat turner's rebellion in 1831 caused so much concern in the southern slave-holding states? a. the revolt caused many plantation owners to stop supporting the institution of slavery. b. the revolt resulted in an end to the expansion of slavery in newly organized territories. c. the revolt proved that enslaved persons were willing to use violence to secure their freedom. d. the revolt showed that the mistreatment of enslaved persons would result in a national civil war.