Which of the following led to the introduction of indirect rule in Nigeria by the British?

The manpower and personnel shortages experienced by the British colonial administration in Nigeria led to the introduction of indirect rule. Indirect rule was a system of governance in which local indigenous leaders were appointed as representatives of the colonial power. This was done because the British did not have enough personnel or manpower to directly govern the diverse and vast territory of Nigeria. By using local leaders, the British were able to maintain control over the region with minimal resources. The system of indirect rule remained in place until Nigeria gained independence in 1960.