Beginning in the 7th century, some of the most important muslim trade routes led from east africa to the middle east, and were used mainly to transport
a) dyes.
b) marble.
c) slaves.
d) spices.

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.

i believe it to be a democracy