The Mean Square Error (MSE) for the Forecasts Shown in the Following

The mean square error (MSE) for the forecasts shown in the following table is: $\begin{array} { | l | l | l | } \hline \text { Month } & \text { Forecast Demand } & \text { Actual Demand } \\\hline \text { April } & 170 & 180 \\\hline \text { May } & 225 & 200 \\\hline \text { June } & 210 & 200 \\\hline \text { July } & 260 & 240 \\\hline \text { August } & 200 & 230 \\\hline\end{array}$

A) more than 250 but less than or equal to 300.
B) more than 300 but less than or equal to 350.
C) more than 350 but less than or equal to 400.
D) more than 400 but less than or equal to 450.