Concept:Omani rule made Zanzibar a commercial powerhouse in the Indian Ocean trade network.
Explanation:When the Omani Sultanate consolidated control over Zanzibar, it developed the island’s economy around the export of slaves and ivory.
Zanzibar’s strategic location along East African trade routes made it an ideal collection point for enslaved people brought from the mainland.
Omani merchants and plantation owners increased demand for enslaved labour on clove and spice plantations.
As a result, Zanzibar grew into the most important slave-trading centre in East Africa during the 18th and 19th centuries.
The Sultanate did not spread Christianity, end the slave trade, or create a unified East African state.
Answer:C. The establishment of a major center for the East African slave trade.