The one that best describe the outcome of the 1913 case Guinn v. US is : The case was a victory for NAACP because it overturned a law that would have limited African American voting rights. The case became a turning point for the equality of voting rights that we see in the US today
The most important reason that the Confederate States needed to be recognized was to better its trade with Europe. It was different if the Europeans were trading with a set nation rather than a large chunk of land that wanted nothing to do with the Union, a big part of the trade at the time.