[Expert Solution]: The weight of a 3-month-old infant with…

The weight of a 3-month-old infant with tretalogy of Fallot has declined from the 25th percentile to the 5th. Which mechanism would not suspect is the reason for this inadequate weight gain? A. Cyanosis resulting in cerebral change. B. Decreased arterial oxygen level resulting in polycythemia. C. Pulmonary hypertension resulting in recurrent respiratory infections. D. Inadequate oxygen perfusion leading to activity intolerance resulting in diminished energy.