标准成本按其所依据的生产技术和经营管理水平的分类包括（）。

A.基本标准成本

B.理想标准成本

C.正常标准成本

D.现行标准成本

A 56-year-old male has a blood pressure reading of 146/96mmHg. Upon hearing the reading, he exclaims, "My pressure has never been this high. Will I need to take medication to reduce it" Which of the following responses by the nurse would be best（）

A. "Yes. Hypertension is prevalent among males; it’s fortunate we caught this during your routine examination. "

B. "We’ll need to reevaluate your blood pressure because your age places you at high risk for hypertension. "

C. "A single elevated blood pressure doesn’t confirm hypertension. You’ll need to have your blood pressure reassessed several times before a diagnosis can be made. "

D. "You have no need to worry. Your pressure is probably elevated because you’re in the doctor’s office. "