A. checking European inroad into Yorubaland
B. restoring the dignity of the Alaafin
C. reducing the powers of Ibadan
D. forming a federated government.
Correct Answer: Option C
C. reducing the powers of Ibadan
Explanation
Ibadan had grown to become the most powerful Yoruba state whose administrative over other Yoruba states
and towns had become oppressive and therefore unpopular.