What is the process for a vehicle to be removed from service due to a critical defect?

The correct choice highlights an essential aspect of safety management in transportation. When a vehicle is identified with a critical defect, the immediate priority is to ensure the safety of all road users. Therefore, the vehicle must be parked right away to prevent any potential accidents or further damage caused by operating a faulty vehicle.

Recording the defect is crucial for accountability and ensuring compliance with safety regulations. This documentation serves as a record of maintenance issues and can assist in preventative measures in the future. The vehicle must then be repaired to meet safety standards, ensuring that it is safe to return to service. This process follows best practices in fleet management and aligns with regulations aimed at promoting the safety of vehicles on the road.

Other choices do not adequately address the urgency and required actions for handling critical defects, which could lead to significant safety risks.