A Limitation of the Studies by Blanke and His Colleagues

A limitation of the studies by Blanke and his colleagues who electrostimulated the brains of individuals undergoing surgery to produce out-of-body experiences is that:

A) the findings might not generalize to people with healthy brains since the subjects had epilepsy or other problems.
B) the stimulation did not reliably induce the changes in body perception, with many failures being seen in attempts to replicate the effect.
C) surgeons were doing the stimulation, rather than trained experimental psychologists.
D) the studies used participant observers and naturalistic observation, so the results may not generalize to the population.