Refer to the Accompanying National Income Data (In Billions of

$$\begin{array} { | l | c | } \hline \text { Disposable Income } & \$ 200 \\\hline \text { Net Private Domestic Investment } & 40 \\\hline \text { US Imports } & 15 \\\hline \text { National Income } & 300 \\\hline \text { Personal Taxes } & 31 \\\hline \text { Net Exports } & 9 \\\hline \text { Gross Private Domestic Investment } & 55 \\\hline \text { Net Foreign Factor Income } & 10 \\\hline \text { Statistical Discrepancy } & 0 \\\hline\end{array}$$ Refer to the accompanying national income data (in billions of dollars) . In these data, U.S. exports are

A) $9 billion.
B) $16 billion.
C) $24 billion.
D) $28 billion.