With respect to the heart:

• A. the inferior (diaphragmatic) surface is made up of one third right ventricle and two thirds left ventricle, separated by the posterior interventricular branch of the left coronary artery
• B. the right border of the heart extends from the lower border of the right 3rd costal cartilage to the lower border of the right 6th costal cartilage
• C. the posterior surface (base) consists almost entirely of the left atrium receiving the three pulmonary veins
• D. the left border consists of the left ventricle only
• E. the right border consists mostly of the right atrium