The left lower trapezius and left serratus exercises do what to the mid-thoracic spine and left ribs?

• A. They rotate the mid-thoracic spine to the right, which internally rotates the left ribs.
• B. They rotate the mid-thoracic spine to the left, which externally rotates the left ribs.
• C. They rotate the mid-thoracic spine to the right, which externally rotates the left ribs.
• D. They rotate the mid-thoracic spine to the right, which internally rotates the left ribs, and they also create the desired kyphosis.

Answer: (D)