Internal Shoulder impingement is

A、Amechanicalirritationofthestructuresinthesubacromialspace
B、Amechanicalirritationofthestructuresintheglenohumeraljoint,typicallyatthepostero-superiorlabrum
C、Amechanicalirritationofthestructuresintheglenohumeraljoint,typicallyattheantero-inferiorlabrum
D、Amechanicalirritationofthestructuresinthesubacromialspace,internaltothebicepstendon