The Following Information Is for a Closed Economy Refer to the Information

The following information is for a closed economy: $\begin{array}{c}\begin{array}{c}\underline{\text { GDP }} \\\$ 100 \\200 \\300 \\400 \\500 \\600 \\700\end{array}\begin{array}{c}\underline{\text { C }}\\ \$ 100 \\160 \\220 \\280 \\340 \\400 \\460 \end{array}\begin{array}{c}\underline{\text { S}} \\\$ 0 \\40 \\80 \\120 \\160 \\200 \\240 \end{array}\begin{array}{c}I_{g} \\\hline \$ 80 \\80 \\80 \\80 \\80 \\80 \\80 \end{array}\end{array}$
Refer to the information.If both government spending and taxes are zero,the equilibrium level of GDP is:

A) $200.
B) $300.
C) $400.
D) $500.