Table 12-29 -Refer to Table 12-29

Table 12-29
$$\begin{array} { | l | r | } \hline & \begin{array} { c } \text { Billions of } \\\text { Dollars }\end{array} \\\hline \text { GDP } & \$ 5,250 \\\hline \text { Transfer } & \\\text { Payments } & 50 \\\hline \text { Retained } & \\\text { earnings } & 700 \\\hline \text { Depreciation } & 1,250 \\\hline\end{array}$$
-Refer to Table 12-29.Based on the table above,what is national income for this economy?

A) $4,700 billion
B) $4,000 billion
C) $3,150 billion
D) $2,450 billion