Question

From least integrated to most integrated, the levels of economic integration are :

a)a common market, a free trade area, an economic union, a customs union, and a political union.

b)a free trade area, a customs union, a common market, an economic union, and a political union.

c)a customs union, a free trade area, a common market, a political union, and an economic union.

d)a common market, an economic union, a customs union, a free trade area, and a political union.