Complete the Following Table and Answer the Question on the Basis

Complete the following table and answer the question on the basis of the resulting data.All figures are in billions of dollars. $\begin{array}{cccccc}\begin{array}{c}\text { Domestic } \\\text { Output } \\\underline{\text { (GDP = DI) }}\end{array} & \begin{array}{c}\text { Aggregate } \\\text { Expenditures, } \\\underline{\text { Closed Economy }}\end{array} & \begin{array}{c}\\\\\underline{\text { Exports }}\end{array} & \begin{array}{c}\\\\\underline{\text { Imports }}\end{array} & \begin{array}{c}\\\text { Net } \\\underline{\text { Exports }}\end{array} & \begin{array}{c}\text { Aggregate } \\\text { Expenditures, } \\\underline{\text { Open Economy }}\end{array} \\ \$ 200 & \$ 230 & \$ 30 & \$ 20 & \$- & \$- \\250 & 270 & 30 & 20 & -&- \\300 & 310 & 30 & 20 & - & - \\350 & 350 & 30 & 20 & - & - \\400 & 390 & 30 & 20 & - & - \\450 & 430 & 30 & 20 & - & - \\500 & 470 & 30 & 20 & - & -\end{array}$ If the economy was closed to international trade,the equilibrium GDP and the multiplier would be:

A) $300 and 5.
B) $350 and 4.
C) $400 and 4.
D) $350 and 5.