How should a driver respond if an articulated tractor begins to jackknife (efecto tijera) on a slippery road?

1. Slam harder on the brake pedal and pull the steering wheel sharply
2. Release the brake pedal immediately to restore rolling traction to the drive wheels, countersteer smoothly into the direction of the skid, and allow ABS to regain vehicle alignment
3. Engage the differential lock and pull the handbrake
4. Accelerate to full throttle immediately