With an Irregularly Irregular Rhythm There Is No R-R Pattern

Multiple Choice

With an irregularly irregular rhythm there is no R-R pattern or similarity between the P-R interval or QRS complexes. Irregularly irregular rhythms are due to abnormalities found in the atria. What disorder that has an irregularly irregular rhythm is illustrated in the ECG tracing in the figure below?
 

A) Wandering atrial pacemaker
B) Atrial tachycardia
C) Atrial fibrillation
D) Atrial depolarization