The region that was not directly involved in Indian Ocean commerce is Iberian Peninsula.
What is the Indian Ocean commerce?
The commerce is about the maritime trade that takes place across the Indian Ocean and the western Pacific Ocean. This commerce has a history spanning thousands of years and continues today.
The commerce of the Indian Ocean has prospered economically and the trade incorporated places such as East Africa, the Persian Gulf, Red Sea and India.
Hence, the region that was not directly involved in Indian Ocean commerce is Iberian Peninsula.
Therefore, the Option A is correct.
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