how were relationships between societies impacted by the Indian ocean trade network?

A. the two civilizations developed a negative relationship because west African traders would not exchange goods other than gold.
B. the middle east and African developed a negative relationship because only Africa benefitted trade.
C. it promoted a positive relationship because it allowed Arab city states to grow.
D. Islam spread peacefully through Africa from the Muslim traders in the Indian ocean trade network.

C. it promoted a positive relationship because it allowed Arab city states to grow.