Fact-checking exercise: In Chapter 1 ("Cannibals, Chocolate, and Cash"), Weatherfordtells us about what the Aztecs used for money. But how do we know whether or howmuch of the story is true? Aztec civilization disappeared 4 centuries ago. What factualevidence do we have about how trade was carried out in the Aztec economy? Find thesources. Summarize what you learn from them and evaluate the accuracy ofWeatherford's version