You have just assisted in the delivery of an approximately 4-kg newborn whose mother is a rather petite primapara. On assessment, you note that there is no spontaneous movement of the infant's right arm at the shoulder, but he moves the elbow and wrist. He otherwise exhibits vigorous movement and has a 1-minute APGAR score of 9. Which of the following should you suspect?
A. Spinal cord damage
B. Caput succedaneum
C. Fractured clavicle
D. Neonatal abstinence syndrome