When a group of countries have removed all tariffs quotas and export subsidies on trade among themselves that is called:

When a group of countries have removed all tariffs quotas and export s

1.	When a group of countries have removed all tariffs quotas and export subsidies on trade among themselves that is called:
A.	Laissez faire
B.	Liberal Trade region
C.	Free Trade zone
D.	All of the above one
Answer» D. All of the above one