What is the consequence of both rolling friction and traction being lost?

When both rolling friction and traction are lost, the most accurate consequence is that the wheels lock and do not turn while moving. Rolling friction is essential for providing grip between the tires and the roadway, while traction is crucial for the vehicle's ability to accelerate, steer, and brake effectively.

When these two forces are lost, the vehicle's wheels can no longer rotate freely; instead, they can slide across the surface. This sliding occurs because the tires lose their ability to grip the road, leading to a loss of control. In this state, the driver may experience difficulty steering and braking, as the vehicle is unable to respond as it normally would. The vehicle essentially becomes unmanageable, resulting in a situation where the wheels are not turning effectively, which can lead to a hazardous loss of control.

Other options do not accurately reflect the consequences of losing both rolling friction and traction. The vehicle would not steer effectively, brake efficiently, or come to a complete stop under these conditions—rather, it would be in a compromised state where the wheels are locked.