An example of a whistleblower $($in relation to ethics$)$ would be a$($n$)$:

a$.$

executive who imposed fines on employees who behaved unethically.

b$.$

security guard who sent notices to employees who drove too fast in the company parking lot.

c$.$

company specialist conducting training programs about ethics.

d$.$

bookkeeper who told a journalist about fraudulent accounting in the company.