Concept:Oba Ewuare is celebrated as the greatest and most influential ruler of the Benin Kingdom.Explanation:Oba Ewuare, also called Ewuare the Great, ruled Benin in the 15th century.He expanded the kingdom, reorganised the government, and transformed Benin City with walls and moats.His reign marked the peak of Benin’s political and military power.The other rulers listed, though important, are not generally described as the greatest in Benin history.Answer:A. Oba Ewuare