The Table Given Below Shows the Real Gross Domestic Product

The table given below shows the real gross domestic product (GDP) ,consumption,and planned investment in an economy.The marginal propensity to consume (MPC) in the economy is:
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Table 9.3
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$$\begin{array} { c c c } \begin{array} { c } \text { Real } \\\text { GDP } ( \$ ) \end{array} & \text { Consumption } ( \$ ) & \begin{array} { c } \text { Planned } \\\text { Investment } ( \$ ) \end{array} \\\hline 0 & 140 & 100 \\100 & 220 & 100 \\200 & 300 & 100 \\300 & 380 & 100 \\400 & 460 & 100 \\500 & 540 & 100 \\600 & 620 & 100 \\700 & 700 & 100 \\800 & 780 & 100 \\900 & 860 & 100 \\1,000 & 940 & 100 \\1,100 & 1,020 & 100 \\1,200 & 1,100 & 100 \\1,300 & 1,180 & 100\end{array}$$

A) 0.
B) 0.2.
C) 0.8.
D) 0.9.
E) 80.