Multiple Choice
The figure above shows the market for iPhones. Which of the following shifts the demand curve from D0 to D1?
A) An increase in people's incomes.
B) A requirement that all students at universities have an iPhone.
C) A decrease in the price of Zunes, a substitute for iPhones.
D) An increase in the price of iPhones.
E) A decrease in the price of iPhones.
Correct Answer:

Verified
Correct Answer:
Verified
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