Answer the Question Based on the Information in the Table

Multiple Choice

$$\begin{array} { | c | c | c | c | } \hline \text { Money Supply } & \text { Money Demand } & \text { Interest Rate } & \begin{array} { c } \text { Investment (at Interest } \\\text { Rate Shown) }\end{array} \\\hline \$ 400 & \$ 600 & 2 \% & \$ 700 \\\hline \$ 400 & 500 & 3 & 600 \\\hline \$ 400 & 400 & 4 & 500 \\\hline \$ 400 & 300 & 5 & 300 \\\hline \$ 400 & 200 & 6 & 200 \\\hline\end{array}$$ Answer the question based on the information in the table. The equilibrium interest rate in this economy is

A) 3 percent.
B) 4 percent.
C) 5 percent.
D) 6 percent.