Answer:
B)the growth of Islamic trading routes and the prohibition of
enslaving fellow Muslims
Explanation:
During the period between 600 - 1450, there was a growing increase for slaves in-order to carry out some expedition like farming, support during the war,as well as being a manual laborer in an industry.
To achieve this, there was a need to engage in slave trade where most black are traded for other items. Unfortunately, the slave trade boomed as a result of the growth of Islamic trading routes and the prohibition of enslaving fellow Muslims.