The Following Five Jobs, Along with Their Processing Time and Due

Multiple Choice

The following five jobs, along with their processing time and due dates, are given below.
$\begin{array}{|l|l|l|}\hline & \text { Processing } & \text { Days Due } \\\hline \underline{\text { Job }} & \underline{\text { Time (days) }} & \text { From Today } \\\hline \text { A } & 8 & 12 \\\hline \text { B } & 4 & 9 \\\hline \text { C } & 3 & 6 \\\hline \text { D } & 7 & 7 \\\hline \text { E } & 5 & 20 \\\hline\end{array}$

-Using the shortest processing time (SPT) rule, the average flow time for the five jobs is _____.

A) less than or equal to 5 days
B) more than 5 but less than or equal to 10 days
C) more than 10 but less than or equal to 15 days
D) more than 15 but less than or equal to 20 days