Answer:
Option C. What can be concluded from the Union's desire to blockade ports in the South is that Foreign nations were willing trade partners with the Confederacy.
Step-by-step explanation:
During the Civil War, Union forces established a blockade of the Confederate ports down in the South of the country. This action was taken in order to prevent the Confederacy to export cotton with foreign nations in exchange of war supplies or money that would later be used against the Union army.