Concept:Pre-independence British West African constitutions were designed to keep central control in the hands of the colonial governor.
Explanation:In these constitutions, the governor was not just the head of the executive.
He was also a member of the legislative council.
This meant the governor sat in both councils at the same time.
Through this dual membership, the colonial government could control law-making and administration.
It also allowed the governor to veto or guide decisions easily.
Separation of powers was not practised because power was concentrated in the governor.
Federalism was not adopted in these early constitutions.
Council of elders was a traditional African institution, not a colonial feature.
Therefore, the common feature was the governor's membership of both legislative and executive councils.
Answer:B. governor's membership of both the legislative and executive councils.