Answer: Option (D) is correct.
Explanation:
Correct option: Trade increases
When a group of countries sit together and agreed to establishes a free- trade zone, this will most likely to increases the trade between the member nations.
Free trade zone refers to remove the barriers, custom interventions and tariffs, so that there will be no restrictions on the free flow of goods and services between the member nations.
Hence, elimination of the barriers across the border lead to increase the trade between the nations.
