Alack of conscience is most characteristic of those who experience disorder.

A lack of conscience is most characteristic of those who experience antisocial personality disorder.

Explanation:

The ability to bifurcate between good and bad deeds and staying on the side of good is referred to as conscience. It is through this sense of conscience, morals are born and strengthened.

An individual who lacks morals in most likely to turn antisocial. Ones who find it difficult to choose what is socially good for themselves and the society can most probably be suffering from antisocial personality disorder.

answer; i do believe its (b) 12.5 years of age;