-Return on Operating Assets for 2005 Is:
A)7

$$\begin{array} { l r r } \text { Operating assets } & \underline { 2005 } & \underline { 2004 } \\\text { Short-term debt } & 10,500 & \$ 10,000 \\\text { Long-term debt } & 3,5000 & 1,000 \\\text { Minority interest } & 500 & 4,000 \\\text { Common equity } & 5,500 & 5,000 \\& & \\\text { Operating income } & 1,350 & \\\text { Interest expense } & 350 & \\\text { Tax expense } ( 40 \% ) & 400 & \\\text { Minority interest } & 50 & \\\text { Net income } & 550 &\end{array}$$
-Return on operating assets for 2005 is:

A) 7.9%.
B) 7.41%.
C) 8.78%.
D) 8.1%.