Which of the Following Is True of Retaliatory Discharge

Which of the following is true of retaliatory discharge?

A) It is a broad term that encompasses terminations in response to an employee exercising rights provided by law.
B) It exists when an employee quits her or his position; and retaliates against their former company on social media.
C) It is a way of penalizing employees due to some legitimate, non-discriminatory reasons.
D) It includes failure on an employer's part to accommodate a disability or a religious belief at the workplace.