**Core Concept**
Personality disorders are chronic mental health conditions characterized by enduring maladaptive patterns of behavior, cognition, and inner experience. Treatment of personality disorders is challenging and often requires a comprehensive approach involving psychotherapy, medication, and supportive interventions.

**Why the Correct Answer is Right**
Behavioral therapy, particularly dialectical behavior therapy (DBT), is a widely accepted and effective treatment for personality disorders. DBT combines cognitive-behavioral techniques with mindfulness and acceptance-based strategies to help individuals manage emotions, improve relationships, and develop coping skills. This approach is particularly useful for borderline personality disorder and other disorders characterized by impulsivity and emotional dysregulation.

**Why Each Wrong Option is Incorrect**
**Option A:** Antipsychotic drugs are not the primary treatment for personality disorders, although they may be used in some cases to manage symptoms of psychosis or agitation.
**Option B:** While SSRIs may be used to treat comorbid mood or anxiety disorders, they are not a primary treatment for personality disorders.
**Option D:** Personality disorders often require treatment, as they can significantly impact an individual's quality of life and relationships.

**Clinical Pearl / High-Yield Fact**
DBT emphasizes the importance of developing a therapeutic relationship and teaching individuals skills to manage emotions, tolerate distress, and improve relationships. This approach can be particularly effective in individuals with borderline personality disorder, who often struggle with emotional dysregulation and impulsivity.

**Correct Answer: C. Behaviour therapy**