This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper Extremity, Subject name: Anatomy
A 34-year-old female skier was taken by ambulance to the hospital after she struck a tree on the ski slope. Imaging gives evidence of a shoulder separation. Which of the following typically occurs in this kind of injury? 
Select and explain. 
A. Displacement of the head of the humerus from the glenoid cavity, B. Partial or complete tearing of the coracoclavicular ligament, C. Partial or complete tearing of the coracoacromial ligament, D. Rupture of the transverse scapular ligament
B: Partial or complete tearing of the coracoclavicular ligament
Answer: B: Partial or complete tearing of the coracoclavicular ligament 
Explanation: In shoulder separation, either or both the acromioclavicular and coracoclavicular ligaments can be partially or completely torn through. The acromioclavicular joint can be interrupted and the distal end of the clavicle may deviate upward in a complete separation, while the upper limb droops away inferiorly, causing a "step off" that can be palpated and sometimes observed. Displacement of the head of the humerus is shoulder dislocation, not separation. The coracoacromial ligament is not torn in separation (but it is sometimes used in the repair of the torn coracoclavicular ligament). Disruption of the glenoid labrum often accompanies shoulder dislocation.