Which of the Following Best Describes an Accelerated Idioventricular Rhythm

Which of the following best describes an accelerated idioventricular rhythm (AIVR) ?

A) Rapid, chaotic rhythm with no pattern or regularity
B) Gradual alteration in the amplitude and direction of the QRS; atrial rate indiscernible, ventricular rate 150 to 250 beats/min
C) Regular ventricular rhythm with QRS complexes measuring 0.10 second or less; P waves may occur before, during, or after the QRS; ventricular rate 41 to 60 beats/min
D) Essentially regular ventricular rhythm with QRS complexes measuring 0.12 second or greater; atrial rate not discernible; ventricular rate 41 to 100 beats/min