During the Isovolumetric Relaxation Phase of the Cardiac Cycle__________

Multiple Choice

During the isovolumetric relaxation phase of the cardiac cycle__________, .

A) atrioventricular valves are closed; aortic and pulmonary valves are open
B) atrioventricular, aortic, and pulmonary valves are open
C) atrioventricular, aortic, and pulmonary valves are closed
D) atrioventricular valves are open; aortic and pulmonary valves are closed