Concept:The Oyo Empire was the leading political and administrative power in Yorubaland during the 19th century.
Explanation:Yorubaland in the 19th century consisted of many independent kingdoms and towns.
Among these states, the Oyo Empire was the most powerful and influential.
It wielded administrative authority over many other Yoruba territories.
The Oyo ruler and his chiefs controlled conquered provinces through military might.
This allowed Oyo to collect tribute and enforce its decisions across Yoruba land.
The Ijebu people were strong traders, but they did not govern the whole Yoruba region.
Dahomey was a separate, largely non-Yoruba kingdom located to the west.
Ile Ife was important as a spiritual and religious centre, not as the administrative overlord.
Therefore, the correct choice must be the Oyo Empire.
Answer:B. Oyo empire