Answer:
d. D
Step-by-step explanation:
Shortage occurs when the quantity demanded is greater than the quantity supplied while scarcity is a naturally occurring limitation in supply. For goods A, B and C, the quantity demanded at the given prices is greater than the supplied, which means that an increase in price could potentially decrease demand and eliminate the shortage. As for good D, there is not enough of it to satisfy the market at any price, which means that the good is scarce.
The answer is d. D.