A Nurse Who Was Recently Certified in Chemotherapy Administration Fails

A nurse who was recently certified in chemotherapy administration fails to check compatibility of phenytoin before injecting into a continuous infusion of D₅W leading to occlusion of the line.Which statement by the nurse demonstrates a red herring?

A) The nurse is upset and states,"I am sure I have injected this before without a problem" and the supervisor interprets this to mean the nurse often take shortcuts.
B) The nurse states,"You are just upset because I am certified in chemotherapy administration and you are not."
C) "The nurse who started the IV didn't get a blood return but determined the IV was the patient's-that is the problem."
D) "This drug always occludes the line because it is so viscous."