Given the Following Historical Data, What Is the Moving-Average Forecast

Multiple Choice

Given the following historical data, what is the moving-average forecast for period 6 based on the last three periods?
$$\begin{array} { | c | c | } \hline \text { Periud } & \text { Value } \\\hline 1 & 73 \\\hline 2 & 68 \\\hline 3 & 65 \\\hline 4 & 72 \\\hline 5 & 67 \\\hline\end{array}$$

A) 67
B) 68
C) 69
D) 100
E) 115