Select the correct statement about the Heart Valves.

• A. Aortic and pulmonary valves control the flow of blood into the heart.
• B. The av valves are supported by chordae tendineae so that regurgitation of blood into the atria during ventricular contraction does not occur.
• C. The tricuspid valve divides the left atrium from the left ventricle.
• D. The mitral valve separates the right atrium from the right ventricle.