Why would one expect the AD curve to be vertical?

A. People do not make choices based on relative prices, but instead based on absolute prices.
B. If the price level rises, changes in choices by suppliers are offset by changes in demanders.
C. If the price level rises, relative prices haven't changed so people would not change their choices.
D. Substitution is not one of the reasons why the AD curve has its slope.


Answer: C

Economics

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