What Is a Requisite for the Survival of Any Economic

What is a requisite for the survival of any economic union?

A) avoiding potentially significant opportunities for international business
B) having agreements and mechanisms in place in order to settle economic disputes
C) including into the union countries with diverse economies, distinctive monetary systems, developed agricultural bases, and different natural resources
D) establishing of a comprehensive agriculture and economic policy
E) ensuring biased treatment of goods produced within the union