Concept:The Oyo Mesi was the council of senior chiefs in the Yoruba pre-colonial political system, and its head was the Bashorun.
Explanation:In the Oyo Empire, the Oyo Mesi served as the kingmakers and as a check on the authority of the Alaafin.
The Bashorun was the leader and spokesman of this council.
He acted as the prime minister of the Oyo Empire.
His duties included implementing the decisions made by the Alaafin and the Oyo Mesi.
He also represented the voice of the council and the people.
When the council lost confidence in the Alaafin, the Bashorun presented an empty calabash to him.
This act was a vote of no confidence, and the Alaafin was then expected to commit ritual suicide or go into exile.
The Aremo was the Alaafin's eldest son, the Oba was the king, and the Baale headed a town or village.
Therefore, none of these, but the Bashorun, led the Oyo Mesi.
Answer:C. Bashorun