I believe the answer is: B. schizoid
People that have schizoid personality disorder tend to show lack of interest in social interaction, prefers to live in solitary, and usually could only show a cold emotion.
The main difference between schizoid and antisocial disorder is that even though people with schizoid disorder have limited emotional expression, they still could distinguish which actions are right and which are wrong while people with antisocial disorder can't distinguish them,
