An employer victimises an employee if the employer--
(a) dismisses the employee from employment with the employer or terminates the engagement of the employee by the employer, or
(b) alters the employee's position in his or her employment with the employer, or alters the circumstances of the employee's engagement by the employer, to the employee's prejudice, or
(c) otherwise injures the employee in his or her employment with, or engagement by, the employer.