A nurse is caring for an infant diagnosed with tetralogy of Fallot. The infant's caregiver asks the nurse to explain this diagnosis. Which of the following is an accurate statement about this condition?

A. Tetralogy of Fallot is a congenital heart defect consisting of four abnormalities: pulmonary stenosis (narrowing of the pulmonary valve or artery), ventricular septal defect (VSD), right ventricular hypertrophy (thickening of the right ventricular muscle), and an overriding aorta (aorta positioned over the VSD). These defects collectively impair oxygenated blood flow, leading to cyanosis. This statement accurately explains the condition in simple terms for caregivers. B. While the overriding aorta is one component of tetralogy of Fallot, this statement is incomplete and does not address the other three defects. C. A VSD is part of the condition, but this explanation omits the additional defects (pulmonary stenosis, right ventricular hypertrophy, and overriding aorta), making it incomplete. D. This statement incorrectly lists three defects that are not part of tetralogy of Fallot (aortic stenosis, atrial septal defect, left ventricular hypertrophy) and misidentifies the number of defects, making it inaccurate.