Trade was very important to the Aztecs. Merchants carried goods such as gold, lake salt, and fine cloths to the southern regions of Mesoamerica. There, the Aztecs traded for other goods such as exotic bird feathers and jaguar skins. The Aztecs particularly desired cacao beans, which could be made into chocolate. The passage describes how the Aztecs and other Mesoamericans were dependent on each other for?

A. cotton and rubber.
B. agricultural items.
C. animal products.
D. luxury items.