Which statement is NOT true about holding the door?

A、Don’tbethepersonaskingfortheelevatortobeheld.;
B、Don’tholdthedoorifyouareinanelevatorfullofpeople.;
C、Don’tholdthedoorforapersonapproachingtheelevatorifyouarealoneinit.;
D、Don’tholdthedoorforafriendorcolleaguewhohastakenaquickside-trip.