As Part of Their Orientation to a Cardiac Care Unit

As part of their orientation to a cardiac care unit, a group of recent nursing graduates is receiving a refresher in cardiac physiology from the unit educator. Which of the following teaching points best captures a component of cardiac function?

A) "Efficient heart function requires that the ventricles do not retain any blood at the end of the cardiac cycle."
B) "Recall that the heart sounds that we listen to as part of our assessments are the sounds of the myocardium contracting."
C) "The diastolic phase is characterized by relaxation of ventricles and their filling with blood."
D) "Aortic pressure will exceed ventricular pressure during systole."