Final answer:
Lat Pulldowns are the best option to alleviate restricted range of motion in the upper back musculature, by targeting the latissimus dorsi, which helps improve flexibility and strength in the arms and shoulders.
Step-by-step explanation:
To alleviate restricted range of motion in the upper back musculature, the most effective exercise from the options provided would be Lat Pulldowns. Lat Pulldowns primarily target the latissimus dorsi, which is a large muscle of the upper back that helps with shoulder and back movements, including extending, adducting, and medially rotating the arm. This exercise can help improve flexibility and range of motion as it involves the movement of the arms and shoulders, which can stretch and strengthen the muscles of the upper back, aiding in alleviating restricted range of motion.