Answer the Question on the Basis of the Following Data

Answer the question on the basis of the following data.All figures are in billions of dollars. $\begin{array} { l r } \text { Gross Investment } & \$ 18 \\\text { National Income } & 100 \\\text { Net Exports } & 2 \\\text { Personal Income } & 85 \\\text { Personal Consumption Expenditures } & 70 \\\text { Saving } & 5 \\\text { Government Purchases } & 20 \\\text { Net Domestic Product } & 105 \\\text { Statistical Discrepancy } & 0\end{array}$ Refer to the data.Disposable income is:

A) $83.
B) $73.
C) $75.
D) $77.