Which of the following is illustrated by the Big Mac Index published by The Economist?

Question

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The Big Mac Index published by The Economist is an illustration of the purchasing power parity theory. This theory suggests that exchange rates between countries should equalize the prices of goods and services in those countries. The Big Mac Index compares the prices of Big Mac burgers in different countries to demonstrate differences in purchasing power and exchange rates.

Which of the Following Is Illustrated by the Big Mac