Which of these created a Christian protectorate in Arabia?

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Ethiopia created a Christian protectorate in Arabia in the early 6th century under the rule of king Kaleb. He intervened in the conflict between two Christian factions, the Axumites and the Himyarites, and established a protectorate over the Christian community in Yemen. This allowed for the spread of Christianity in the region and helped secure Ethiopia's position as a powerful Christian kingdom in the Horn of Africa. India, Rome, and Persia did not create a Christian protectorate in Arabia.

Which of These Created a Christian Protectorate in Arabia