Concept:The Alafin of Oyo was not chosen by popular vote, but by a specific council of kingmakers within the Oyo traditional political system.
Explanation:The Oyo Mesi was the influential council of seven principal chiefs in the Oyo Empire.
This council had the exclusive duty of selecting and installing a new Alafin.
They acted as the kingmakers because no person could become Alafin without their approval.
The other groups listed, such as Bales, Obas, and Ogboni, held important roles but were not responsible for choosing the Alafin.
Therefore, the correct group responsible for electing the Alafin is the Oyo Mesi.
Answer:A. Oyo Mesi