Concept:An exceptional demand curve shows a direct relationship between price and quantity demanded, meaning more is bought at higher prices.
Explanation:A normal demand curve slopes downward, obeying the law of demand.
An exceptional demand curve slopes upward, contradicting the law of demand.
Consumers buy more even when price rises, instead of less.
One major reason is expectation of a future price increase.
If buyers believe prices will go up later, they purchase more now at the current higher price.
This behavior creates an exceptional demand curve.
Other causes include giffen goods, goods with prestige value, fear of shortage, and basic necessities.
An increase in raw material prices or population size does not cause an exceptional demand curve.
A change in taste normally shifts a regular demand curve, not produce one that slopes upward.
Answer:C. expectation of future price increase.