Which of the following would not change demand? a. the income of the consumers. b. the price of related products. c. the price of the product. d. information about the product's health effects.

Option (c) is correct.

Explanation:

Option A:

Income of the consumer is related to the normal and inferior goods.

If there is an increase in the income level of the consumer then as a result the demand for normal good increases and there is a rightward shift in the demand curve of normal good.

Option B:

Price of related goods: substitute goods and complimentary goods.

For example,

If there is an increase in the price of one good then as a result the demand for the substitute good increases which will shift the demand curve of substitute goods rightwards.

Option C:

If there is an increase in the price of the product then as a result the quantity demanded for that product decreases. This shows that price of the product would not change the demand but the quantity demand.

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