A54-year-old man presents with numbness and weakness of the left hand. examination reveals decreased pinprick sensation in the first three and a half fingers and over the thenar eminence along with weakness of thumb flexion and abduction. nerve conduction studies will most likely detect a problem at which of the following sites? a. median nerve at the carpal tunnelb. median nerve in the forearmc. radial nerve in the armd. ulnar nerve at the elbowe. ulnar nerve at the wrist