What dangerous handling hazard occurs if heavy cargo is loaded entirely at the extreme rear overhang behind the rear axle of a rigid truck?

1. The front steer axle becomes overloaded, causing tire blowout
2. The braking distance is cut in half due to excess rear tire grip
3. The front steer axle becomes unloaded, drastically reducing steering grip and promoting dangerous understeer and vehicle instability
4. The engine cooling system immediately overheats