The most ethical course of action the reporter could take is:
B. tell the editor-in-chief about her relationship to the pilot, and ask that the story be assigned to another reporter.
This choice maintains journalistic integrity by being transparent about a potential conflict of interest. It ensures that the investigation is conducted fairly and impartially, without any bias that could arise from the reporter’s personal relationship with the subject of the investigation. It also allows the newsroom to handle the story with another reporter who can approach it without familial ties.