Frick and Moffitt (2010 ) demonstrated that impulsive and antisocial youths who show callous-unemotional traits:

a) Are less likely to recognize fear in other and are less sensitive to punishment cues.
b) Are more fearless and show thrill-seeking behaviour.
c) Are similar in emotional, cognitive and personality characteristics to psychopathic adults.
d) All of the above.

d