A whistleblower is an employee who:

A. Exposes organizational wrongdoing.

The answer is A

A person who exposes misconduct, alleged dishonest or illegal activity occurring in an organization. The alleged misconduct may be classified in many ways; for example, a violation of a law, rule, regulation and/or a direct threat to public interest. Whistleblowers may make their allegations internally (for example, to other people within the accused organization) or externally (to regulators, law enforcement agencies, to the media or to groups concerned with the issues).

An employee is said to blow whistle, when he tells relevant authority about wrongdoing going on in organization.

Thank you Wasi giving me opportunity to answer this quiz. 

Option  (A) is the correct Ans. Whistle blower brought the attention of company's management, if there is any wrong happening in the organization. 

Referees disputes with other employees.

the answer is C. Engages in unethical behavior.

A whistle blower is a person who informs on a person or organization regarded as engaging in an unlawful or immoral activity.

Best Regards

Whistleblower is the one who exposes organizational wrongdoing. Answer is A.

The right option is (C) Engages in unethical behavior