Answer:
c.No one else in the department had overtime hours but Harkanell.
Step-by-step explanation:
Jerry Harkanell as an administrative staff means that his incharge of the clerical duties of the company which included the personnel informations regarding to no of hours worked, overtimes and leave day offered to some staff.
One of the major red flag that made somone to become suspicious is on the issue of overtime. How is it possible that, it was only him that had overtime hours in the whole of the company knowing fully well that his job might not necessarly need and overtime.