**Core Concept**
Antisocial personality disorder is a mental health condition characterized by a pervasive pattern of disregard for the rights of others, lack of empathy, and impulsivity. It is often associated with a history of aggression, violence, and antisocial behavior. The cardinal feature of this disorder is a consistent disregard for societal norms and expectations.

**Why the Correct Answer is Right**
The cardinal feature of antisocial personality disorder is a pervasive pattern of disregard for the rights of others, lack of empathy, and impulsivity. Individuals with this disorder often engage in manipulative and deceitful behavior, and may exhibit a lack of remorse for their actions. This behavior is thought to be related to abnormalities in the functioning of the prefrontal cortex and the amygdala, which are regions of the brain involved in impulse control and emotional regulation.

**Why Each Wrong Option is Incorrect**
**Option A:** Lack of impulse control is a characteristic of various psychiatric conditions, including attention deficit hyperactivity disorder (ADHD) and bipolar disorder. While individuals with antisocial personality disorder may exhibit impulsive behavior, this is not the cardinal feature of the disorder.

**Option B:** Grandiosity is a characteristic of narcissistic personality disorder, not antisocial personality disorder. Individuals with narcissistic personality disorder often have an exaggerated sense of self-importance and may exhibit arrogant and haughty behavior.

**Option C:** Suicidal behavior is a characteristic of mood disorders, such as major depressive disorder and bipolar disorder. While individuals with antisocial personality disorder may engage in self-destructive behavior, this is not the cardinal feature of the disorder.

**Clinical Pearl / High-Yield Fact**
The term "antisocial personality disorder" was previously known as "sociopathy" or "psychopathy." However, the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) no longer uses these terms, as they are considered outdated and stigmatizing.

**Correct Answer:** D.