Problem: A 43-year-old man comes to the physician because of a 1-month history of sharp, shooting pain that radiates from his neck to his upper back and down his right arm following injury to the neck. Physical examination shows drooping of the right shoulder and weakened right shoulder shrug. He cannot lift his right arm above shoulder level. The function of which of the following muscles is most likely damaged? A. Deltoid B. Levator scapulae C. Scalene D. Splenius capitis E. Trapezius