【正确答案】 D

【答案解析】The bladder isn't usually palpable unless it's distended. The feeling of pressure is usually relieved with urination. Reduced bladder tone due to general anesthesia is a common postoperative complication that causes difficulty in voiding. A urinary tract infection and renal calculi aren't palpable. The kidneys aren't palpable above the symphysis pubis.