Figure 28-5 -Refer to Figure 28-5.Consider the Phillips Curves Depicted in the Curves

Figure 28-5

-Refer to Figure 28-5.Consider the Phillips curves depicted in the graph above.The Fed announces its intention to decrease inflation from 10 percent to 5 percent per year,and it succeeds. If the assumptions of the rational expectations school hold true,and the Fed's announcement is credible,the rate of unemployment will be ________ in the short run.

A) less than 5.5 percent
B) 5.5 percent
C) between 5.5 and 7.5 percent
D) 7.5 percent