What is the difference between ventricular tachycardia and ventricular fibrillation?

A. Ventricular fibrillation is chaotic in appearance; ventricular tachycardia has an absence of P waves, a heart rate of 40-100 bpm, and a wide and bizarre QRS complex.
B. Ventricular fibrillation is chaotic electrical activity with only fibrillatory waves; ventricular tachycardia has an absence of P waves, a heart rate less than 20 bpm, and wide and bizarre QRS complexes.
C. Ventricular tachycardia has three or more PVCs and a heart rate greater than 100 bpm; ventricular fibrillation has no P wave and an early QRS complex that is wide and bizarre in appearance.
D. Ventricular tachycardia has three or more PVCs and a heart rate greater than 100 bpm; ventricular fibrillation is chaotic electrical activity with only fibrillatory waves.

Answer: D