Question

an increase in the quantity demanded of a good is most often due to:
a. lower prices.
b. a decrease in the price of a substitute good.
c. an increase in wages paid to workers.
d. higher prices.

Explanation:

Quantity demanded refers to a movement along the demand curve, which is caused only by a change in the good's own price. A lower price leads to an upward movement along the demand curve, increasing quantity demanded. A decrease in substitute good price shifts the entire demand curve (decreasing demand, not quantity demanded). Worker wages affect supply, not quantity demanded. Higher prices decrease quantity demanded.

Answer:

a. lower prices.