Which is true of muscles of the pectoral girdle?

• A. direct muscles are inserted into the clavicle or scapula from the axial skeleton, eg pectoralis major
• B. indirect attachment to the axial skeleton is represented by serratus anterior
• C. the sternocostal fibres of pectoralis major from the 6th costal cartilage are inserted higher on the lateral lip of the intertubecular soleus than the fibres from the first cartilage
• D. biceps muscle gives no stability to the shoulder joint
• E. trapezius is the only muscle to be supplied by all five segments of the brachial plexus