-Using the Data from the Above Table,the Marginal Propensity to

$$\begin{array} { | c | c | } \hline \begin{array} { c } \text { Disposable } \\\text { income } \\\text { (dollars) }\end{array} & \begin{array} { c } \text { Consumption } \\\text { expenditure (dollars) }\end{array} \\\hline 100 & 225 \\\hline 200 & 300 \\\hline 300 & 375 \\\hline 400 & 450 \\\hline 500 & 525 \\\hline 600 & 600 \\\hline\end{array}$$
-Using the data from the above table,the marginal propensity to save is

A) falling as disposable income is rising.
B) 0 when disposable income is $600.
C) constant at 0.25.
D) constant at 0.75.