What is the main purpose of the talk？A．To show what happens after an economy has experienc
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What is the main purpose of the talk？
A．To show what happens after an economy has experienced a boom-and-bust cycle
B．To illustrate the conditions needed to produce a boom-and-bust cycle
C．To demonstrate how boom-and-bust cycles have changed over time
D．To explain why the boom-and-bust cycle is not a frequent historical occurrence
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