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Multiple Choice
Which of the following events could shift the demand curve for corn to the left?
A
A successful advertising campaign promoting the health benefits of corn
B
A decrease in consumer income, assuming corn is a normal good
C
A decrease in the price of corn
D
An increase in the price of wheat, a substitute for corn
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Verified step by step guidance
1
Understand that a leftward shift in the demand curve means a decrease in demand at every price level.
Recall that a decrease in consumer income typically shifts the demand curve for a normal good to the left, because consumers buy less of the good when they have less income.
Recognize that a successful advertising campaign promoting health benefits would increase demand, shifting the demand curve to the right, not left.
Note that a decrease in the price of corn causes a movement along the demand curve (change in quantity demanded), not a shift of the demand curve itself.
Understand that an increase in the price of wheat, a substitute for corn, would increase demand for corn, shifting its demand curve to the right, not left.