Circular flow models are used to show: A. how tax rates affect economic productivity.
B. how unemployment leads to economic problems.
C. how money moves through an economy.
D. how investments gain and lose value over time.

Basically, the model of Circular flow is an economic model used to show how money moves through an economy.

The circular flow model is an economic model that shows how money, goods and services moves between the sectors in an economic system.

Hence, the model of Circular flow is an economic model used to show how money moves through an economy.

Therefore, the Option C is correct.

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