Final answer:
The shelf of available Gizmos is often empty.
Step-by-step explanation:
The correct answer is a. the shelf of available Gizmos is often empty. In the market for Gizmos Puzzle Toys, the equilibrium price is $12, but the current market price is $10. This means that the price of Gizmos is below the equilibrium price. When the price is below the equilibrium, the quantity demanded exceeds the quantity supplied, leading to a shortage. As a result, the shelf of available Gizmos is often empty because there is more demand than supply.