As the U. S. Constitution was being written, each delegate represented his state in the debates about how to set up this new national government. The Three-fifths Compromise was an agreement where each slave was counted as three-fifths of a person to determine each state's population. Which region of the United States benefited the most from this compromise? A) The Northern states since they employed so many slaves in their factories. B) The New England states since they employed so many slaves in their mining and logging industries. C) The Mid-Western states since they employed so many slaves on their large ranches. D) The Southern states since they employed so many slaves on their plantations.