Figure 18-4 The Graph Below Illustrates the Market for Nurses Who Work

Figure 18-4
The graph below illustrates the market for nurses who work in doctors' offices.
-Refer to Figure 18-4. Each August many high school and college students visit a doctor's office to have a sports physical. If the price of sports physicals falls, what happens in the market for nurses?

A) Demand increases from D1 to D2.
B) Demand decreases from D2 to D1.
C) Supply increases from S1 to S2.
D) Supply decreases from S2 to S1.