Which of the following statements accurately describes the normal orientation of the heart in the thoracic cavity?
a. Located along midline with base oriented inferiorly and apex oriented superiorly.
b. Three-fourths of the heart lies to the right of midline.
c. Three-fourths of the heart lies to the left of midline.
d. Apex of the heart is directed inferiorly and to the left of midline.
e. Two-thirds of the heart lies to the right of midline.