Final answer:
The glenohumeral joint can be injured due to overuse or trauma, especially in activities that require repetitive upper limb movement or in situations where force is applied leading to dislocations, inflammations, and degenerative changes.
Step-by-step explanation:
A glenohumeral joint may be injured for several reasons, and the correct answer is b) Overuse or trauma to the shoulder joint. Repetitive use of the upper limb, especially during activities requiring abduction movements, like throwing or swimming, can lead to a range of shoulder problems such as inflammation, tears, or degeneration. Dislocations primarily occur in an inferior direction when significant force is applied, such as when a person lands on an outstretched hand or elbow. Additional overuse or traumatic injuries can cause shoulder stiffness or adhesive capsulitis, commonly known as "frozen shoulder." The glenohumeral joint is a ball-and-socket joint providing a wide range of motion but with less stability, which can make it more susceptible to injuries.