A 37-year-old male had physical therapy for 4 weeks after a healed radius fracture with open reduction and internal fixation (ORIF). He was discharged with a home program. He has returned 1 month later because he says his pain is still at least 9/10. Examination findings are within normal limits (WNL) except for: grip strength 3/5, hyperalgesia to the entire hand, hyperhidrosis, and skin that was warm to palpation with some edema and hair loss on the fingers. What does the physical therapist suspect?

a) ORIF hardware possibly compressing median nerve
b) fracture not yet healed
c) injury to the vasculature at the time of injury not properly addressed
d) complex regional pain syndrome