The greatest problem faced by the Old Oyo Empire in the early 19th century was the?

A. weakening of the central authority
B. incursion of the jihadists
C. British encroachment into Yorubaland
D. dominant influence of Bashorun Gaha.

Correct Answer: Option A

A. weakening of the central authority

Explanation

The other options are the effects of the selected answer.