The main difference between a free trade area and a customs union is that the members of a customs union ________.

The main difference between a free trade area and a customs union is that the members of a customs union ________.

A) accept a common stance on economic and political policies regarding nonmember nations

B) harmonize their tax, monetary, and fiscal policies and create a common currency

C) agree to treat trade with all nonmember nations in a similar manner

D) agree to the free movement of all factors of production