an otherwise healthy 35-year-old man is exposed to subzero temperatures for 24 hours. after initial management of hypothermia and rapid rewarming of the hands, bilateral upper extremity frostbite is evaluated. physical examination shows severe frostbite of the hands and up to the wrists bilaterally. which of the following is the most appropriate next step in management?
A) Corticosteroid therapy
B) Heparin therapy
C) Surgical debridement
D) Systemic antibiotic therapy
E) Thrombolytic therapy