Answer:
The correct option is : a. European union
Step-by-step explanation:
The European Union is an economic and political union. It is composed of 28 member countries, which are primarily located in the Europe.
The European Union was formed in Maastricht, Netherlands, 1993 by signing the Maastricht Treaty. Originally, the European Union was formed by the union of only twelve countries. The primary motive of this union was reasserting the economic position of the Europe against Japan and the United States of America.