Concept:A demand schedule is a table showing how much of a good buyers are willing to purchase at different price levels.
Explanation:A demand schedule lists prices and the corresponding quantities demanded.
It focuses on the buyer's side of the market.
At each given price, the schedule shows the quantity that consumers are ready to buy at that particular time.
This quantity is called quantity demanded.
It does not refer to supply, production, or storage.
Therefore, the schedule indicates the quantities of goods that are bought at given prices at a time.
Answer:A. bought at given price at a time