Anthony is 32 years old, well above average in intelligence, and quite charming. He has swindled several older people out of their life savings, and he seems to have little feeling for his victims, nor does he fear the consequences of getting caught. His behavior is evidence of:

A) bipolar disorder.
B) obsessive-compulsive disorder.
C) a dissociative disorder.
D) a personality disorder.
E) schizophrenia.