Answer:
C. Southern States
Explanation:
The lack of power in foreign affairs of the Confederation Congress had a big impact on the economy of some the states its was controlling. The most affected were the Southern States, with their economy suffering badly because of the undertaken measures. The measures, such as the cotton embargo on the British Empire and France, actually turned out to be an embargo against themselves, as they shut down their own trade, while the British and French found new sources for cotton. This hit the economy very badly, and that turned out to have been impact on the final outcome of the conflict in US.