The correct answer would be the following: All the following countries participate in NAFTA except Greenland. The NAFTA (North American Free Trade Agreement) is an international agreement signed by Canada, Mexico and the United States on January 1st, 1994. It created a trilateral trade bloc of all three north american countries. Its main objective is to eliminate trade barriers between the three nations, so that they could exchange goods and service between themselves at a more competitive cost.