C. Mob attacked the printing presses and forced them to flee.
Explanation:
During the war between the Southern states and the Union, there were carious propaganda deployed by various states inorder to dessiminate information which would favour their own side. Those that refused to do their bidding was attacked as was obatainable in the Southern states.
A typical example is the editor of the Richmond Daily Whig who was against the secession. He was forced to resign as a result of public pressure and attacks he was getting.
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