Final answer:
The correct order from superior to inferior is true ribs, false ribs, and floating ribs, with true ribs attaching directly to the sternum and floating ribs not attaching to the sternum at all.
Step-by-step explanation:
The correct order of ribs from superior to inferior is true ribs, false ribs, floating ribs. True ribs (1-7) attach directly to the sternum via their costal cartilage. False ribs (8-12) either attach to the sternum indirectly or not at all. Specifically, ribs 8-10 have their costal cartilages attached to the cartilage of the next higher rib, while ribs 11 and 12, known as floating ribs, do not attach to the sternum or to another rib and end within the musculature of the lateral abdominal wall.
Therefore, the correct answer to the question is c. true, false, floating.