Answer:
NAFTA, European Union, WTO(World Trade Organisation)
Step-by-step explanation:
NAFTA(North American Free Trade Agreement ) is the treaty signed by Canada, United States and Mexico. It came in to effect on January 1, 1994 and created a trilateral trade block.
The European Union is economic and political union of 28 European countries. The total population of Union is more than 12 million while the combined areas of the member countries is more that 4,000,000 square kilometres.
The World Trade Organisation was established in 1995 to regulate trade. The member countries of WTO make trade agreements. GATT (General Agreement on Tariffs and Trade) is one such agreement aimed to lowed the trade barriers in international trade.