A nurse reviews blood pressures of several patients. Which finding will the nurse report as prehypertension?

A) 98/50 in a 7-year-old child
B) 115/70 in an infant
C) 120/80 in a middle-aged adult
D) 146/90 in an older adult

An adult's blood pressure tends to rise with advancing age. The optimal blood pressure for a healthy, middle-aged adult is less than 120/80. Values of 120 to 139/80 to 89 mm Hg are considered prehypertension. Blood pressure greater than 140/90 is defined as hypertension. Blood pressure of 98/50 is normal for a child, whereas 115/70 can be normal for an infant.