Before an officer can ask for identification from a passenger, what must the passenger do?

The correct answer is that a passenger must engage in the traffic stop before an officer can ask for identification. This is based on the requirement that passengers, like the driver, must comply with certain legal expectations during a traffic stop. When a vehicle is being stopped by law enforcement, the nature of the interaction evolves into an investigative detention, where both the driver and passengers are subject to law enforcement scrutiny.

Engaging in the traffic stop signifies that the passenger is aware of the situation and is present during the interaction between the driver and the officer. This compliance can help establish communication, allowing the officer to assess the situation fully and determine if they need to request identification based on reasonable suspicion or legitimate criteria.

The other options do not align with legal standards required during a traffic stop. Waving at the officer might show acknowledgment but does not constitute engagement. Showing hands on the dashboard, while a compliance gesture, does not directly indicate the officer's ability to ask for identification. Exiting the vehicle without being prompted by the officer can potentially raise issues of officer safety and may not be legally necessary for the passenger during a stop. Therefore, the act of engaging in the traffic stop is key for the officer's ability to ask for identification from a passenger.