Cable Company Had the Following Results for the Year Just

Multiple Choice

Cable Company had the following results for the year just ended:
$\begin{array}{|l|r|}\hline \text { Operating Income } & \$ 2,500 \\\hline \text { Turnover } & 4 \\\hline \text { Return on Investment } & 20 \% \\\hline\end{array}$
What were Cable Company's average operating assets during the year?

A) $10,000.
B) $12,500.
C) $50,000.
D) $200,000.