During the Isovolumetric Phase of Ventricular Systole, the

During the isovolumetric phase of ventricular systole, the

A) atrioventricular valves and semilunar valves are closed.
B) atria are contracting and the ventricles are relaxing.
C) blood is ejected into the great vessels.
D) all of the above
E) B and C only