Answer the Question on the Basis of the Following Data

Multiple Choice

Answer the question on the basis of the following data for a hypothetical economy. $\begin{array}{cc}\underline{\text { Disposable Income} } &\underline{ \text { Saving } }\\0& \mathbf{- 1 0} \\50 & 0 \\100 & 10 \\150 & 20 \\200 & 30\end{array}$
Refer to the given data.At the $100 level of income,the average propensity to save is:

A) .10.
B) .20.
C) .25.
D) .90.