Paul, CFA, heads the research department of a large brokerage firm. Paul has supervisory responsibility over 25 analysts. If Paul delegates some supervisory duties, which statement best describes his responsibilities based on the Standards of Professional Conduct（）

A. Paul is not responsible for those duties he has delegated to his subordinates.

B. Paul’s supervisory responsibilities only apply to analysts with the CFA designation.

C. Paul retains supervisory responsibility for all subordinates despite his delegation of some duties.

NB/T47014-2011《承压设备焊接工艺评定》中规定，当增加或变更次要因素时，不需要重新评定，亦不需要重新编制预焊接工艺规程。（）