Which of the Following Is NOT True with Regard to Procedures

Which of the following is NOT true with regard to procedures?

A) as long as the instructions are uniformly presented, it is not very important how an experimenter greets and otherwise interacts with the participants
B) the handling of rats between the home cages and the test apparatus can influence the outcome of the experiment
C) all participants should experience the same events even though they are totally unrelated to the experiment
D) it is far more important to treat human participants in exactly the same manner than it is for non-human participants