Using the Following ANOVA Summary Table, How Many Means Are

Using the following ANOVA summary table, how many means are being compared, and how many subjects were included in each treatment? (Assume equal ns.) $\begin{array}{|l|l|l|l|l|}\hline \text { Source of variation } & \text { SS } & \text { df } & \text { MS } & \text { F } \\\hline \text { Between } & 270 & 9 & & \\\hline \text { Within } & 5600 & 560 & & \\\hline \text { Total } & & & & \\\hline\end{array}$

A) 9 means, 56 subjects
B) 9 means, 57 subjects
C) 10 means, 56 subjects
D) 10 means, 57 subjects