The Nurse Will Not Label an Evacuated Tube Before Entering

The nurse will not label an evacuated tube before entering the patient's room because

A) The nurse could accidently use the labeled tube for the wrong patient.
B) Tubes should be labeled after they have all been filled and the nurse has left the patient's room, just before being sent to the laboratory.
C) Doing so would be less time efficient, although it would reduce the likelihood of an error.
D) Labeling the tube later ensures that the writing on the label is more legible.