Which of the Following Supports the Economic Case for Regional

Which of the following supports the economic case for regional economic integration?

A) International institutions such as the World Trade Organization have been moving the world away from a free trade regime.
B) The greater the number of countries involved in a free trade agreement,the fewer the perspectives that must be reconciled.
C) Coordination and policy harmonization problems are largely a function of the number of countries that seek agreement.
D) It is difficult to establish a free trade and investment regime among a limited number of adjacent countries as compared to the world community.
E) Since most governments do not intervene,unrestricted free trade and FDI have become a reality.