Which statement best describes the central axis concept in PRI movement strategy?

• A. It is a fixed line through the spine regardless of stance.
• B. The axis passes through the orbit of the right eye, central tendon of the diaphragm, central right hip, and right pelvic floor on the right side only.
• C. It is a flexible axis influenced by hip and thoracic alignment, not involving diaphragms.
• D. The central axis is stance-dependent and passes through the orbit of the eye, central tendon of the diaphragm, central hip, and pelvic floor on the stance side.

Answer: (D)