The Glenohumeral Joint That Articulates the Humerus to the Pectoral

The glenohumeral joint that articulates the humerus to the pectoral girdle is a highly mobile joint. This mobility comes at a cost because _________.

A) the blood vessels that lead to the arm and hand can easily be cut off by the free range of motion
B) these type of joints are harder to control and coordinate
C) the joint is relatively unstable and can easily dislocate
D) muscles that span this mobile joint will only provide a reduced amount of power