Concept:This question checks the knowledge of nationalist organisations in colonial West Africa and their specific demands.
Explanation:The National Congress of British West Africa (NCBWA), formed in 1920, was one of the earliest nationalist bodies in West Africa.
It demanded constitutional and political reforms under colonial rule.
One of its key demands was that the appointment and deposition of chiefs should be controlled by the people themselves.
The NCBWA opposed the colonial government taking full power over traditional chieftaincy matters.
Other movements, such as the West African Students' Union and the West African Youth League, did not make this particular demand their central issue.
Answer:B. National Congress of British West Africa