Which of the Following Statements Is True About the Success

Which of the following statements is true about the success factors for regional integration?

A) The more distinct the economies of the member countries, the more likely the economic bloc will succeed.
B) Countries should strictly hold onto their national autonomy in order to form a successful bloc.
C) Economic dynamism, a factor for successful regional integration, is often deficient in developed economies.
D) Similarity in political systems enhances prospects for a successful bloc.