Every Type of Economic Union Shares the Development and Enlargement

Every type of economic union shares the development and enlargement of market opportunities as a basic orientation. Which of the following best describes the primary way market opportunities are enlarged by economic unions?

A) Preferential tariff treatment for participating members
B) Use of embargos to eliminate rival competition
C) Formulation of cartels
D) Seeking economic dominance through boycotts of rivals
E) Movement toward a common language as a means to overcoming economic hurdles