A. size of the population
B. income of the consumer
C. price of the commodity
D. taste and fashion
Correct Answer: Option C
C. price of the commodity
Explanation
A movement along a given demand curve caused by a change in demand price. The only factor that can cause a change in quantity demanded is price. A related, but the distinct, concept is a change in demand. This change in quantity demanded is caused by a change in the demand price.