Concept:ECOWAS focuses on uniting West African states for shared progress.
Explanation:Despite facing various challenges, ECOWAS has consistently worked toward bringing member countries closer together.
It promotes free movement of goods, services, and people across borders.
It also encourages joint decision-making on trade, peace, and security matters.
These efforts are aimed at deepening regional ties and mutual cooperation.
Thus, its main achievement has been fostering integration among West African nations.
Answer:D. regional integration and cooperation