Answer:
Correct answer is NAFTA.
Explanation:
NAFTA is correct answer as it refers to trade agreement between Canada, United States and Mexico. It was signed in 1994.
NATO is not correct as it refers to political and military organization created in 1949.
OAS is not correct as it is created on a basis of preserving peace and protection on American continent.
UN is not correct answer as it refers to organization whose goal is to preserve peace in the world.
