Under what conditions can a crew member arrest a passenger?

The correct answer focuses on the circumstances under which a crew member is empowered to act in the interest of flight safety. A crew member has the authority to arrest or detain a passenger when there is reasonable ground to believe that a safety offense is occurring. This means that if a crew member reasonably suspects that a passenger's behavior could jeopardize the safety and security of the flight, they are justified in taking appropriate action to mitigate that risk.

This ensures the safety of all individuals on the aircraft, as crew members are trained to recognize behaviors that may pose a threat to flight operations. By having the authority to intervene in such situations, crew members can maintain order and prevent potentially dangerous situations from escalating.

In contrast, while intoxication and disruptive behavior can indeed lead to safety concerns, the specific wording of the correct answer emphasizes the necessity of a "reasonable ground to believe" that a safety offense is occurring, which is a broader and more formal standard than simply suspecting intoxication or witnessing minor offenses. Moreover, not all disruptive behavior automatically qualifies as a safety offense without the context of it causing potential harm or risk to flight safety.