Answer the Question on the Basis of the Following Table

Answer the question on the basis of the following table for a particular country in which C is consumption expenditures,I_g is gross investment expenditures,G is government expenditures,X is exports,and M is imports.All figures are in billions of dollars.Each question is independent of other question using the same table,unless otherwise stated. $\begin{array}{c}\begin{array}{c}\underline{\text {Price Level}}\\128 \\125 \\122 \\119 \\116\end{array}\begin{array}{c}\underline{\text {C}} \\ \$ 18 \\20 \\22 \\24 \\26\end{array}\begin{array}{c}\underline{\mathrm{I}_{\mathrm{g}} }\\ \$ 2 \\4 \\6 \\8 \\10\end{array}\begin{array}{c}\underline{\text {G }}\\ \$ 3 \\3 \\3 \\3 \\3\end{array}\begin{array}{c}\underline{\text {X }}\\\$ 1 \\2 \\3 \\4 \\5\end{array}\begin{array}{c}\underline{\text {M}} \\ \$ 5 \\4 \\3 \\2 \\1\end{array}\begin{array}{c}\underline{\text {Real GDP}} \\ \\\\\\ \\\\\end{array}\end{array}$
Refer to the table.If equilibrium real GDP is $31 billion,the equilibrium price level will be:

A) 128.
B) 125.
C) 122.
D) 119.