Final answer:
The primary purpose of the scapular activation drill is to improve shoulder stability by strengthening the muscles around the shoulder blades, which helps prevent injuries and improve posture.
Step-by-step explanation:
The primary purpose of the scapular activation drill is C) Improve Shoulder Stability. These exercises are designed to strengthen the muscles around the shoulder blades—the scapulae—thereby increasing the shoulder girdle stability. This added strength helps prevent shoulder injuries and can improve posture as well. This drill is specifically designed to activate and strengthen the muscles around the scapula, or shoulder blade, which helps to stabilize the shoulder joint. By enhancing shoulder stability, athletes can reduce the risk of shoulder injuries and improve their overall performance in activities that require overhead movements, such as throwing or serving in sports. Scapular activation drills are particularly important for athletes or individuals who engage in activities that require repetitive arm and shoulder movements.