Karlin Is in Dialectical Behavior Therapy for Borderline Personality Disorder

Karlin is in dialectical behavior therapy for borderline personality disorder. She is working with her therapist on how to say "no" to her sister, who has often exploited her. What part of dialectical behavior therapy focuses on this skill?

A) interpersonal effectiveness skills training
B) emotional regulation skills training
C) distress tolerance skills training
D) mindfulness skills training