In a Study in Which Psychopaths and Normal People Were

In a study in which psychopaths and normal people were shown extremely grisly and unpleasant photographs, the psychopaths reacted in which way to the photographs?

A) The psychopaths were visibly startled by the photographs just as normal people were.
B) The psychopaths pretended unconvincingly to be startled by the photographs.
C) The psychopaths showed no startle response to the photographs.
D) The psychopaths were visibly attracted and aroused by the photographs.