When complaints against staff are brought to Human Resources

Let's start with the correct option which is OPTION C
In option c, the possibility of an uncorroborated claim of wrongdoing getting unfair, biased and prejudicial treatment against an employee indicted is higher that it's not happening.

For other options, let's see why they are wrong
Option A: The statement does not state in specifics that three indeed exists any protest, contest nor was there an opposition to the allegations.
The complaints leveled against the employees already put them at a disadvantage and stiffens their ability to prove their innocence.

Option B: The statement does not just refer to employees, it also infers that members of the public could open a case against them with the Human Resources Department. In which case, identity remains anonymous whilst been speculative, reprisals would not suffice here because the corporation could lay-of workers in absentia, with uncorroborated claims by merely establishing a case against them.

Option D: This infers a conflicting defense statements would not sway the decisions of the Judges herein, who would rely majorly on the power of discretion and not that of attorney.

Option E: 'cannot always determine whether there was just cause for the complaint.' According to the writer, not exactly all innocent employees are adjudged guilty always. There have existed situations where cases have been fairly conducted and decided