Concept:ECOWAS aims at regional integration through economic cooperation and free movement.
Explanation:ECOWAS achievements include the establishment of a common market for member states.
It also promotes the free movement of people, goods, and services across borders.
Military cooperation, such as peacekeeping missions, is another key achievement.
Trade restrictions are not an achievement; ECOWAS works to remove them.
Thus, the correct set is i, ii, and iii only.
Answer:B. i, ii and iii only