Hello.
One literary device, which is more often associated as a philosophical device, is the dialectic<span>. This involves the discussion of a concept and its opposite. Another way of thinking of it is that dialectic involves a contradiction (X and its opposite) and a possible solution, balance, or synthesis (combination of X and its opposite)
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The answer is A if all you have in your paragraph are claims, people may not believe you. Hope this helps
The answer would be C: Secession defied the principles of the Confederacy.