For the Following Questions, Consult the Diagram Below

For the following questions, consult the diagram below:
Figure 34-1

-Refer to Figure 34-1.At an interest rate of 4 percent there is excess

A) money demand equal to the distance between a andb
B) money demand equal to the distance between b and c.
C) money supply equal to the distance between b and a.
D) money supply equal to the distance between c and b.