A change in demand means a change in consumers' desire to purchase a particular good or service, irrespective of a change in its price. 

The following are the factors affecting a change in demand

• The Consumer's Income.
• The Price of Related Goods.
• The Tastes and Preferences of Consumers.
• The Consumer's Expectations.
• The Number of Consumers in the Market.

From the above explanation, the price of the commodity does not affect the willingness of the consumer to purchase the commodity, hence option E is the correct option.