What Was the Nature of the Aztec Economy

What was the nature of the Aztec economy?

A) The Aztecs failed to develop a merchant class, so all distribution of goods was carried out by the state.
B) The Aztecs developed a free market economy in which all trade was in the hands of specialized merchants.
C) The Aztec state redistributed many goods received as tribute, but there was a specialized merchant class that also handled long-distance trade in rare commodities.
D) There was little trade within Aztec society, as almost all communities were self-sufficient.