The passage suggests that "some Civil War historians" would probably agree with which of the following statements about Southern Unionists? A. Their economic circumstances were more significant than their social and cultural identities in determining their dissent from the Confederate cause. B. Their significant to historians lies mainly in what their actions reveal about the mainstream of Confederate nationalism from which they departed C. Their political allegiance must be understood in relation to specific local factors that affected their lives during the Civil War period D. They were more likely to be from areas outside the upper South and Appalachia than were supporter of the Confederate cause E. They were more likely to be from economically privileged groups than were supporters of the Confederate cause.