Answer:
I would say the answer is C
Step-by-step explanation:
Sometimes dialectical behavioral therapy can work but "responding best" to it is an over statement, people that have an antisocial personality often know how to speak and interact with people who they are comfortable and have the tools to speak, but the anxiety of talking to a new person can be very hard for them to tap in the tools they have. For improving by the age of forty well people do change but it still is not as common. Medication and psychotherapy can help with the anxiety and the reasoning behind being antisocial, humans are social by nature, so when people are antisocial it means something is disconnected or something happened where they cant express themselves, psychotherapy can help dig into that and help change the actions or behaviors of isolating. And for the very responsive, well they are antisocial so I dont think they would really be willing to talk.