The right answer is " It was the last attempt by the nations of Western Europe to cooperate economically until the creation of the European Union. "
The European Coal and Steel Community (ECSC) was the first European supranational organization to take place and later culminated in the European Union. It arose as a consequence of the border conflict between West Germany and post-World War II France, a time of scarce resources and economic collapse in Europe, for the domination of coal and iron ore present in that place that would be of great importance for future industrial development . To resolve this impasse was created the Schuman Plan, which established a set of conditions to any other European country interested in the joint use of these natural resources.