bill has an author names field named all editors that calculates a list of possible editors of the doc based on values users has entered into another field. The list only contains users’ first and last names, and only should be displayed to users who can edit doc.Which of the following hide-when formulas should bill use to control the display of the field?（）

• A、 @isnotmember(alleditors,@username) 
• B、 @isnotmember(@name([cn]);@username) 
• C、 @isnotmember(alleditors;@name([cn ];@username)) 
• D、 if(@isnotmember(alleditors;@name([cn];@username);@true;@false))