Regarding the shoulder joint

• A. full abduction of the humerus is possible only with medial rotation
• B. glenohumeral ligaments provide significant stability to the joint
• C. the capsule is attached circumferentially to the surgical neck of the humerus
• D. nerve supply comes from the axillary, musculocutaneous and suprascapular nn
• E. the subacromial bursa extends laterally when the arm is abducted