Match Each of the Following Components of the ECG Graph

Match each of the following components of the ECG graph cycle with its definition.
-QRS complex

A) Represents the time interval from the beginning of ventricular depolarization to the end of repolarization of the ventricles
B) Represents the electrical recovery of the ventricles
C) Represents the contraction of the ventricles
D) Represents the time from the end of ventricular depolarization to the beginning of repolarization of the ventricles
E) Represents the contraction of the atria
F) Represents the time from the end of atrial depolarization to the beginning of ventricular depolarization
G) Represents the time from the beginning of atrial depolarization to the beginning of ventricular depolarization
H) Represents the period of time when the heart rests