Concept:The main obstacles to ECOWAS integration arise from the different colonial histories of member states.
Explanation:Colonial rule divided West Africa into Anglophone, Francophone, and Lusophone blocs.
Each bloc had its own currency, legal system, and trade relationships with its colonial master.
This made it difficult to unify economic policies and cooperate effectively.
Using a common currency is an ECOWAS objective, not a limiting problem.
Climatic differences are not a major barrier to integration.
Similarity in languages would improve cooperation rather than hinder it.
The strongest limiting factor is therefore the legacy of strong colonial ties.
Answer:B. Strong colonial ties