Which of the Following Is a Normal Physiological Change Associated

Which of the following is a normal physiological change associated with the aging process?

A) Hormonal changes causing vasodilation and a resulting drop in blood pressure
B) Progressive atrophy of the intramuscular calf veins,causing venous insufficiency
C) Peripheral blood vessels growing more rigid with age,producing a rise in systolic blood pressure
D) Narrowing of the inferior vena cava,causing low blood flow and increases in venous pressure,resulting in varicosities