The Romans introduced D. Camels to North Africa
They taxed traders coming and leaving Ghana, and they used their armies to protect trade routes.
Answer:
A
Explanation:
I think its A, the question is rather vague
The reason is very simple - profit.
The rabbits were not worth much to the Europeans, but were to the Aztecs, but the cocoa beans for the Europeans were like gold. They were a very attractive exotic product from which unique and unseen things were made. In the European market the cocoa beans had enormous price, and the demand for it was very high especially from the aristocracy which loved it and didn't speared money for it.