Concept:The Omani Empire, from its base in Arabia, played a leading role in spreading Islam across East Africa through trade and political control.
Explanation:Oman is a country located on the southeast coast of the Arabian Peninsula.
Historically, Oman had strong trading connections with the East African coast across the Indian Ocean.
During the 17th and 18th centuries, Omani rulers challenged Portuguese domination along that coast.
They successfully expelled the Portuguese from key East African centres like Mombasa and Zanzibar.
This Omani takeover allowed the establishment of Arab Muslim settlements in the region.
Omani sultans later moved their capital to Zanzibar for greater influence.
Omani merchants and officials introduced and encouraged the practice of Islam.
Their intermarriage with local communities helped Islam spread into the interior of East Africa.
As a result, the spread of Islam across East Africa is mainly credited to Omani influence.
Answer:The correct option is B. Omani.