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Regional economic group is defined as ________.
i. an agreement among countries in a geographic region to reduce and ultimately remove tariff and nontariff barriers to the free flow of goods, services and factors of production between each other
ii. an agreement among companies in a geographic region to reduce and ultimately remove tariff and nontariff barriers to the free flow of goods, services and factors of production between each other
iii. an agreement among countries in a geographic region to increase tariff and nontariff barriers to the free flow of goods, services and factors of production between each other
iv. an agreement among countries in a geographic region to increase tariff and nontariff barriers to the free flow of goods, services and factors of production with nonmember countries