Movement Along the Demand Curve Is Illustrated by Which of the Following

Movement along the demand curve is illustrated by which of the following?

A) Prices remain the same, but there is a significant increase in demand.
B) Prices remain the same, but there is a significant decrease in demand.
C) As the price is raised, the quantity demanded increases, assuming all else stays the same.
D) As the price is lowered, the quantity demanded increases, assuming all else stays the same.
E) Movement along the curve rather than a shift of the curve indicates that some significant event has taken place outside the organization that has affected demand.