What must you do if you are involved in a collision?

The appropriate response when involved in a collision is to check for injuries and call the police if necessary. This is a critical first step to ensure everyone's safety and well-being. Assessing the situation allows you to determine if medical assistance is required for anyone involved, which is paramount in potentially serious situations.

Notifying law enforcement is essential because they can document the incident and help manage traffic, which can prevent further accidents. A police report can also be vital for insurance claims and legal issues that may arise later.

The other options do not promote safety or responsible conduct after an accident. Leaving the scene can lead to legal consequences, including hit-and-run charges. Getting into another vehicle can be unsafe and could complicate the situation. Merely exchanging information without addressing any injuries or involving authorities does not provide adequate protection or documentation for all parties involved.