from least integrated to most integrated, the levels of economic integration are a question 16 options: common market, a free trade area, an economic union, a customs union, and a political union. free trade area, a customs union, a common market, an economic union, and a political union. customs union, a free trade area, a common market, a political union, and an economic union. common market, an economic union, a customs union, a free trade area, and a political union.
