Suppose the average person needs 8 glasses of water each day to maintain optimal health. What would an economist conclude?
A) The average person will therefore drink 8 glasses each day.
B) The average person will therefore drink more than 8 glasses each day, just to play it safe.
C) There are no substitutes for water.
D) The amount the average person drinks will depend upon the opportunity cost of acquiring water.
D
Economics
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