For what reason might an officer need to suspend a driver's license immediately?

The correct choice pertains to Driving Under the Influence (DUI) because this offense poses a significant threat to public safety. When an officer determines that a driver is operating a vehicle while impaired—whether due to alcohol or drugs—immediate suspension of the driver's license can be implemented. This action is crucial to prevent further potential harm on the road, as individuals under the influence have a heightened risk of causing accidents.

Although failing to adhere to traffic signals, having a tire violation, and parking in a no-parking zone are violations of traffic laws, they do not carry the same immediate safety concerns as DUI. Traffic signals and minor equipment violations may result in citations or fines but typically do not justify an immediate suspension of driving privileges. Parking violations, too, are generally managed through fines rather than licensing actions. Therefore, DUI stands out as a critical reason for an officer to act swiftly in suspending a driver's license to safeguard the community.