The Table Below Includes Processing Times and Due Dates for Five

The table below includes processing times and due dates for five jobs.
$\begin{array}{|l|l|l|}\hline & \text { Processing } & \text { Days Due } \\\hline \text { Job } & \text { Time (days) } & \text { From Today } \\\hline \text { A } & 16 & 24 \\\hline \text { B } & 23 & 30 \\\hline \text { C } & 22 & 40 \\\hline \text { D } & 8 & 28 \\\hline \text { E } & 10 & 18 \\\hline\end{array}$
-Using the shortest processing time (SPT) rule, the average flow time for the five jobs is _____.

A) less than or equal to 10 days
B) more than 10 but less than or equal to 20 days
C) more than 20 but less than or equal to 30 days
D) more than 30 but less than or equal to 40 days