Among the options given on the question, option B is the answer.
The North American Free trade Agreement.
Explanation: North American Free Trade Agreement is treaty between Canada, Mexico and United States. NAFTA was the world largest free trade agreement which was signed on 1994 between these three countries. They agreed to remove all barriers to advance the trade facilities between these counties. However this treaty is seen as response to the European Union which was established on 1993 between the European countries to make sure the free trade and other possible facilities.
