Concept:Abnormal demand is the type of demand that moves in the same direction as price, which is the reverse of the law of demand.
Explanation:The law of demand states that as price rises, the quantity demanded falls, so the demand curve slopes downward from left to right.
Abnormal demand behaves in the opposite way.
At higher prices, consumers demand more of the product, so the demand curve slopes upward from left to right.
This situation is known as abnormal demand and is typical of Giffen goods or prestige goods.
Therefore, it directly gives rise to the reverse of the law of demand.
Answer:C. Abnormal demand