Which message key (MKE) should be used if a stolen vehicle's occupants are believed to be armed and dangerous?

When dealing with a situation where a stolen vehicle's occupants are suspected of being armed and dangerous, the appropriate choice is to use the message key designated as EV-F. This key indicates an emergency involving a vehicle and carries a specific emphasis on the potential danger presented by its occupants.

Using EV-F ensures that the message is prioritized and disseminated rapidly to law enforcement and relevant agencies. This is crucial because the presence of armed individuals escalates the risk of confrontation and requires immediate caution and response from law enforcement personnel in the area.

The other options, while they may relate to vehicle incidents or alerts, do not carry the same level of urgency or specificity regarding the potential threat posed by armed individuals. They might not adequately convey the seriousness of the situation, which is critical in ensuring the safety of officers and the public.