Circuit riders . a)traded goods between England and the Southern Colonies
b)educated the plantation owners' children
c)rode horseback from town to town preaching

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories

the answer is b. hope this

the exodus of these people from constantinople contributed to the revival of greek and roman studies, which led to the development of the renaissance in humanism and science. byzantine emigrants also brought to western europe the better preserved and accumulated knowledge of their own greek civilization