A Person Works an Office Job That Requires Them to Be

A person works an office job that requires them to be in a sitting position for 10 hours a day. They go home and sit until they go to bed. This person never exercises and rarely gets up to move around after being seated. Their joints begin to constantly feel stiff and painful. On a physiological level, what has happened to cause these symptoms?

A) Being stuck in the same position for long periods of time causes the ligaments to physically decay, stiffening the joints.
B) Lack of movement hinders blood from moving through the vessels of the synovial membrane, which starves the ligaments of nutrients and causes them to lose elasticity.
C) Disuse of the joint causes ossification of the fibrocartilage, creating arthritic joints.
D) Lack of movement drives the synovial membranes to stop producing synovial fluid, which then causes friction to generate upon movement of the joints.