The Holmes Division Recorded Operating Data as Follows for the Past

The Holmes Division recorded operating data as follows for the past year:
$\begin{array}{|r|r|}\hline \text { Sales } & \$ 200,000 \\\hline \text { Operating Income } & \$ 25,000 \\\hline \text { Average Operating Assets } & \$ 100,000 \\\hline \text { Shareholders' Equity } & \$ 80,000 \\\hline \text { Residual Income } & \$ 13,000 \\\hline\end{array}$

-For the past year,what was the margin?

A) 12.50%.
B) 13.00%.
C) 14.75%.
D) 15.00%.