Final answer:
The countries that are part of NAFTA and have removed trade barriers among them are the United States, Canada, and Mexico. The correct answer is 1) United States, Canada, and Mexico.
Step-by-step explanation:
The countries that were part of the North American Free Trade Agreement (NAFTA) and had removed barriers to trade among them were the United States, Canada, and Mexico.
This landmark agreement aimed to create a substantial North American market by eliminating or reducing tariffs, taxes, and quotas between these nations.
The goal was to facilitate the flow of goods and services, promote economic integration, and enhance collaboration among the member countries.
NAFTA was later succeeded by the United States-Mexico-Canada Agreement (USMCA), which continued the objectives of promoting free trade and economic cooperation in the North American region.
Therefore, the correct answer is 1) United States, Canada, and Mexico.