The correct answer is C) Slaves Islam made the trade expand enormously and Muslim merchants found roads to some areas of the world, for example in East Africa emerged very commercial cities such as Sofala, Kilwa, Malindi, among others, traded with the Islamic world not only with slaves but also with gold, wood and precious stones. The slaves with which it was commercialized did not have conditions of ethnicity, color or religion, in the early times Arabs were included. The Islamic world trade had no restrictions during its boom.
