Suppose That in Montreal in December, 2009, 10 000 Ski

question 69

Multiple Choice

Suppose that in Montreal in December, 2009, 10 000 ski helmets were sold at a price of $60 each. And in Montreal in December, 2010, 20 000 ski helmets were sold at a price of $80 each. One possible explanation for the change is that from 2009 to 2010 the curve for ski helmets shifted to the _ .

• A)supply; right
• B)demand; left
• C)demand; right
• D)supply or demand; right
• E)supply; left

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