The nurse is instructing an unlicensed assistant on how to collect a urine specimen from an indwelling catheter. Which of the following statements indicates that the assistant understands the instructions

A. "I will empty the catheter drainage bag, have the client drink some water, and an hour later collect the urine that drains into the bag. "
B. "I will get a sterile syringe and remove urine from the catheter through the collection port to place in the specimen container. "
C. "I should collect urine from the catheter drainage bag at the end of the shift and place it in the specimen container. "
D. "I will disconnect the drainage tube from the catheter and let urine run from the catheter into the specimen container. "

女，40岁。右后牙晚间隐痛3天。2个月来，该部位一直食甜和冷物痛。检查：右下第一磨牙颊面龋中深、探酸感；右下第二磨牙远中颈部龋深近牙本质深层，探中等敏感，有食物嵌塞在内，叩痛（+），不松动；远中龈 * * 肿大，探之出血。右下第三磨牙近中阻生，远中龈缘发红，探出血。右上第二前磨牙和第一磨牙颊侧颈部有沟形缺损，探硬且光滑。右上第三磨牙缺失。余未见异常。为明确诊断进一步重要的检查是（）。

A.扪诊

B.咬诊

C.温度测验

D.电活力测验

E.牙周袋检查