(Advanced Analysis)Answer the Question on the Basis of the Following $\begin{array} { l } C = 26 + 0.75 Y \\I _ { g } = 60 \\X = 24 \\M = 10\end{array}$

(Advanced analysis) Answer the question on the basis of the following information for a private open economy.The letters Y,C,I_g,X,and M stand for GDP,consumption,gross investment,exports,and imports respectively.Figures are in billions of dollars. $\begin{array} { l } C = 26 + 0.75 Y \\I _ { g } = 60 \\X = 24 \\M = 10\end{array}$ The equilibrium GDP for the open economy is:

A) $390.
B) $375.
C) $320.
D) $400.