One of the central factors in the establishment of the trans-Saharan trade was
a. The invention of lighter, but still powerful, artillery
b. The domestication of the camel
c. The spread of a common religion
d. The use of large caravans of donkey
One of the central factors in the establishment of the trans-Saharan trade was "b. The domestication of the camel," since only camels could survive the very long distances and extreme heat.
