C. Southern states.
Step-by-step explanation:
A major issue during this time was how they were going to appoint the House of Representatives. The Three-Fifths Compromise appointed the seats in the House of Representatives based on population, while counting slaves. This counted 3 free men for every 5 slaves, given the name the "Three-Fifths Compromise." This benefited the Southern states as they had many slaves, which made them have a larger population and more seats in the House of Representatives.