The United States profited from exports to Europe is the best choice. This is because as we can see from the graph, that the amount of money that U.S exports from the U.S to the European countries has grown as a result of it. This meant that the U.S received a lot of its profits from its exports to the other European countries mainly in the Allied Powers. The U.S was exporting military supplies, equipment and food stuffs to help aid the other European countries in WW1. The main reason why U.S joined the first world war was that German had declared unlimited German submarine warfare and it broke the pact by attacking neutral ships, as a result U.S joined the war.