The correct option is D. The cavity of the body immediately inferior to the diaphragm is the abdominal cavity.
The abdominal cavity is the area occupied by the ventral internal organs that are superior to the pelvic cavity and inferior to the diaphragm.
The second-largest hollow space in the body is the thoracic cavity, also known as the chest cavity. The sternum, or breastbone, the vertebral column, and the ribs enclose it. The diaphragm, a muscular and membranous wall, separates it from the abdominal cavity, the body's largest hollow space.
The heart, which is situated in the mediastinum, and lungs are both housed in the thoracic cavity. The diaphragm creates the thoracic cavity's floor and divides it from the smaller abdominopelvic cavity. The largest cavity in the body is the abdominopelvic cavity.
Thus, The right answer is D. The abdominal cavity is the part of the body that is directly beneath the diaphragm.
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