Of the listed options the option that is not a primary reason why countries are now seeking to pursue regional integration at the expense of multilateral trade liberalization is that NAFTA is pushing the EU to pursue regional integration.
Regional integration can be described as the term that exlplains the way a countries to overcome these costly divisions integrating goods, services and factors' market so that it can facilitate the flow of trade, capital, energy, people and ideas.
It should be noted that the Regional integration is been promoted as aresult of common physical and institutional infrastructure, however The North American Free Trade Agreement (NAFTA), can be seen as the one that was enacted in 1994 whioch help to form free trade zone for Mexico as well as , Canada, and the United States.
Therefore, option A is correct.
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missing options:
A. NAFTA is pushing the EU to pursue regional integration
B.
