The Case for Regional Economic Integration Is That There Are

The case for regional economic integration is that there are:

A) no concerns over the safety of travel from one nation to another and concerns over dissimilar political ideologies.
B) no concerns over costs and concerns over national sovereignty.
C) the possibilities free trade will allow countries to specialise in the production of goods and services and produce them most efficiently.
D) the possibilities that free trade will allow countries to standardise and adapt the production of goods and services.