A group of nurses is reviewing several electrocardiograms (ECGs). The students demonstrate an understanding of the waveforms when they identify which component as indicating ventricular repolarization (relaxation).

A. ST segment: Represents the period between ventricular depolarization and repolarization. B. QRS complex: Represents ventricular depolarization. C. T wave: Indicates ventricular repolarization, or relaxation, after the QRS complex. D. P wave: Represents atrial depolarization.