Which patient is at the highest risk for impaired wound healing?
A. A 22-year-old with a pelvic fracture incurred in a motor vehicle accident
B. A 49-year-old with a history of smoking two packs a day who just had abdominal surgery
C. A 72-year-old with diabetes and cardiovascular disease who had surgical repair of a broken hip
D. A 90-year-old with no chronic health conditions with a small blistered burn on the han