Concept:The Kanuri trace their ruling dynasty to a legendary Arab/Yemeni ancestor.Explanation:The Sefawa (Sayfawa) dynasty, which ruled Kanem-Bornu, claimed descent from Sayf b. Dhi Yazan.Thus, the legendary founder of the Kanuri is Sayf b. Dhi Yazan.Answer:D. Sayf b. dhi Yazan.