Ventricular systole causes...
A) blood to flow into the ventricles.
B) blood to flow out of the atria.
C) the atrioventricular valves to close, and then the semilunar valves to open.
D) the semilunar valves to close, and then the atrioventricular valves to open.
E) pressure to become greater in the aorta and pulmonary trunk than in the ventricles.