Which description correctly describes Ribcage Stabilization #5 Knee Changes?

• A. The arms move overhead while the legs stay stationary.
• B. The torso remains fixed while the knees alternately move in and out.
• C. The hips lift and lower while maintaining rib stability.
• D. One knee comes toward the chest while the other leg extends over the footbar, switching legs while maintaining curl and rib stability.

Answer: (D)