Concept:After Said bin Sultan’s death, his empire was split between his sons into two separate sultanates.Explanation:The African section became the Sultanate of Zanzibar.It was ruled by Majid bin Said.The Asian section became the Sultanate of Muscat and Oman.It was ruled by Thuwaini bin Said.Thus, the Asian section was under Thuwaini bin Said, not under the other listed candidates.Answer:B. Thuwaini bin Said.