65. 中年以上之病患,腎血管性高血壓(renovascular hypertension)的成因中,最常見者為何? (A)粥狀硬化(atherosclerosis) (B)纖維肌肉發育障礙(fibromuscular dysplasia) (C)動靜脈瘻管(arteriovenous fistula) (D)主動脈瘤(aortic aneurysm)