Concept:ECOWAS is slow because of recurring political instability among member states.
Explanation:ECOWAS seeks to promote regional economic integration and cooperation.
Frequent changes of government and ideological differences among member states create instability.
This instability disrupts policy continuity, decision-making, and implementation of community programmes.
Military coups and civil conflicts in some West African countries further delay progress.
Hence, the major obstacle among the given options is political instability.
Answer:C. Political instability.