Final answer:
Whistle-blowing according to Bok is when there is significant harm and all internal channels for resolution have been exhausted.
Step-by-step explanation:
According to Bok, speaking out against something becomes an act of whistle-blowing when two main conditions are fulfilled: significant harm is being caused, and the whistleblower has exhausted internal channels for addressing the issue. Therefore, the correct answer is b) Significant harm and exhausted internal channels. Whistle-blowing is not simply airing grievances or seeking attention; it involves a serious concern about wrongdoing within an organization that could not be resolved through the usual organizational structures.