Concept:A downward sloping demand curve shows the law of demand: price and quantity demanded move in opposite directions.
Explanation:When price falls, buyers are willing and able to purchase a larger quantity.
Therefore, to sell more units, a seller must lower the price.
This inverse relationship is represented by a demand curve that slopes downward from left to right.
Total revenue does not always fall when price is lowered; it depends on price elasticity of demand.
So the most direct meaning of a downward sloping demand curve is that price must be reduced to increase sales.
Answer:A. price must be lowered to sell more.