The correct answer is A. Hyperbaric oxygen therapy. When skin grafts or reconstructive flaps have compromised blood flow, the tissue is not receiving enough oxygen, which can lead to necrosis and graft failure. Hyperbaric oxygen therapy (HBOT) involves breathing 100% oxygen in a pressurized chamber. This increases the amount of oxygen dissolved in the blood plasma, allowing more oxygen to reach the compromised tissues and promote healing and survival of the graft or flap. It is a well-established and commonly used treatment for this condition. That's 2 down. 3 left today — send the next one.