Scenario: Moonland Union Twenty-Six Nations, a Through Z Countries of Moonland Region, Have

Multiple Choice

Scenario: Moonland Union
Twenty-six nations, A through Z countries of Moonland region, have decided to cooperate with one another to eliminate trade barriers among them and create Moonland Union. They are not sure, however, to what extent they want to cooperate.
-The process undertaken by these 26 countries can be described as ________.

A) foreign direct investment
B) regional common marketing
C) economic domestication
D) regional economic integration