Scenario: Moonland Union Twenty-Six Nations of Moonland Region, Have Decided to Cooperate with to Cooperate

Scenario: Moonland Union
Twenty-six nations of Moonland region, have decided to cooperate with one another to eliminate trade barriers among them and create the Moonland Union. They are not sure, however, to what extent they want to cooperate.
-If these twenty-six nations continue to eliminate all barriers to trade among themselves and set a common trade policy against nonmembers,they would create a ________.

A) free trade area
B) preferential trading area
C) customs union
D) political union