This graph correctly illustrates a

This graph correctly illustrates a movement along the supply curve that results when the product price is increased from P1 to P2. Note that the supply curve does not shift. Some students find this puzzling because their intuition tells them that producers will respond to the price increase by increasing production. That increase in quantity is shown in Figure 1 by:
A) A shift that will occur in the future (not illustrated on this graph).
B) the vertical distance between P1 and P2
C) the horizontal distance from Q1 to Q2
D) the area of the triangle ABC