What action is necessary when a ground vehicle is involved in an accident?

Answer: C — Stop and notify authorities immediately

When a ground vehicle is involved in an accident, it is crucial to stop and notify authorities immediately. This action is necessary for several reasons. Firstly, stopping ensures the safety of all involved parties and helps prevent further accidents. Notifying authorities is essential for documenting the incident officially, which can be vital for insurance claims and legal purposes. Police or other emergency responders can assess the situation, provide medical assistance if needed, and file an accident report that contains important details about the incident. Taking photographs of the scene can be helpful but is secondary to stopping and notifying authorities. Leaving the scene could be considered hit-and-run behavior, which can carry severe legal ramifications. Requesting a tow truck is often necessary if vehicles are damaged, but it should occur after the authorities are notified and the safety of everyone involved has been ensured. Therefore, stopping and notifying authorities is the key initial step in responding to an accident.