Final answer:
Demand for Candy Corn can decrease if consumer preferences shift towards healthier options, or if the price of a substitute good, such as chocolate, decreases making it more appealing compared to Candy Corn.
Step-by-step explanation:
To understand how demand for Candy Corn might decrease, let's consider two scenarios. First, imagine that consumer preferences have shifted towards healthier snacks. This change in tastes is a determinant of demand whereby individuals no longer prefer candy as much as they used to, leading to a decrease in the quantity demanded of Candy Corn at any given price. Secondly, consider the price of a substitute good, such as chocolate, decreasing significantly. As chocolate becomes cheaper, consumers might opt for it over Candy Corn, which would again decrease the quantity demanded of Candy Corn at any given price.