Figure 27-4 -Refer to Figure 27-4. in the Graph Above, Suppose the Above

Figure 27-4
-Refer to Figure 27-4. In the graph above, suppose the economy is initially at point A. The movement of the economy to point B as shown in the graph illustrates the effect of which of the following policy actions by the Congress and the president?

A) an increase in transfer payments
B) an increase in interest rates
C) an increase in the marginal income tax rate
D) an open market purchase of Treasury bills