A nurse is completing an assessment of a newborn, including obtaining blood pressure measurements at each extremity. Which of the following findings suggests coarctation of the aorta?

A. Uniformly elevated blood pressures in all extremities may suggest systemic hypertension but does not indicate coarctation of the aorta, which typically produces a pressure gradient between the upper and lower extremities. B. Coarctation of the aorta is a narrowing of the aortic arch, usually distal to the branches supplying the upper body. This obstruction causes higher blood pressure in the upper extremities (arms) and lower blood pressure in the lower extremities (legs). This gradient is a classic finding and may also present with weak or delayed femoral pulses compared to brachial pulses. C. This pattern is opposite of what occurs with coarctation of the aorta and is not consistent with typical congenital aortic obstruction. D. Low blood pressure in all extremities indicates generalized hypotension, which may result from shock or cardiac dysfunction but is not a characteristic sign of coarctation of the aorta.