A 29-year-old male patient sustains multiple trauma in a motor cycle accident. The patient has rib fractures and x-ray reveals possible lung contusion

A 29-year-old male patient sustains multiple trauma in a motor cycle accident. The patient has rib fractures and x-ray reveals possible lung contusion. He is on a non-rebreathing mask at an FiO2 of 75%. ABG reveals: pH 7.43 PaCO2 37 torr PaO2 45 torr HCO3 24 mEq/L This patient would benefit most from which of the following? Group of answer choices Pressure support ventilation Mechanical ventilation in the assist control mode Incentive spirometry CPAP