Josh Is Enrolling Human Participants in a Study That Will

Josh is enrolling human participants in a study that will test whether drivers stop more quickly for men or women in a crosswalk when the pedestrian is disobeying the crossing signal. Because no one would sign up for the study if he were to tell them of its dangerous nature, he advertises it as a "study involving a walk outside." What principle of research is Josh violating?

A) anonymity
B) informed consent
C) confidentiality
D) placebo control