A Movement Along a Demand Curve (Up or Down) for a Product

Multiple Choice

A movement along a demand curve (up or down) for a product occurs ________, assuming that other factors such as consumer tastes, price and availability of substitutes, and consumer incomes remain unchanged.

A) when its price is lowered or increased and the quantity demanded for it correspondingly increases or decreases
B) when its demand is lowered or increased and the price offered for it correspondingly increases or decreases
C) when its demand and price are lowered
D) when its demand and price are increased
E) at the break-even point