Select the correct statement about the heart valves. a. The tricuspid valve divides the left atrium from the left ventricle. b. The mitral valve separates the right atrium from the right ventricle. c. The AV valves are supported by chordae tendineae so that they do not blow back up into the atria during ventricular contraction. d. Aortic and pulmonary valves control the flow of blood into the heart.