What must be ensured about the positioning of the exterior bumpers?

The correct answer focuses on the importance of maintaining the integrity and safety of the vehicle by ensuring that bumpers match the vehicle’s original design. Bumpers are a critical component for absorbing impact and protecting both the vehicle and its occupants during a collision. When bumpers are replaced, they should ideally replicate the original specifications to ensure that the vehicle functions as intended in terms of safety and aesthetics.

Using robust parts can be beneficial, but they need to comply with the manufacturer's specifications and design for the vehicle to maintain its crashworthiness. Any significant alterations from the original bumper design could affect how the vehicle behaves in an accident, potentially leading to increased damage or risk for occupants.

In this context, while the alternatives revolve around bumper conditions, adhering to the vehicle’s original design is crucial for ensuring safety, vehicle registration compliance, and overall vehicle performance.