Final answer:
The first rib articulates with the sternum at the manubrium, close to the sternoclavicular joint, which is the point out of the options provided.
Step-by-step explanation:
The first rib articulates with the sternum in close proximity to the sternoclavicular joint. The sternum is composed of the manubrium, body, and xiphoid process. The junction between the manubrium and the body of the sternum is marked by the sternal angle, which is notable because the second rib attaches here, while the first rib attaches to the manubrium itself, just lateral to where the clavicles meet at the sternoclavicular joints. Thus, the correct answer to the student's question is (D) Sternoclavicular joint.
The first rib articulates with the sternum at the sternal angle. The sternal angle is the junction between the manubrium and body of the sternum, forming a slight bend. The second rib attaches to the sternum at this angle, making it an important landmark for identifying and counting the lower ribs. Since the first rib is hidden behind the clavicle, the second rib is the highest rib that can be palpated.