what statement about psychopaths is true? a. psychopaths are unable to understand or respond to the emotions of others. b. when psychopaths are shown images of facial expressions of emotions, they are not as able to identify the emotions as other people are. c. psychopaths are unable to respond to emotional states except for sadness. d. psychopaths are able to understand the emotions of others, but they do not feel for them, particularly when they feel sadness.