Which of the following symptoms indicates conduct disorder?

Frequent lying to avoid consequences is a key symptom that indicates conduct disorder. This behavior reflects a pattern of deceitfulness, manipulativeness, and a tendency to disregard societal norms and rules. In individuals with conduct disorder, such actions are often part of a broader pattern of behavior that includes aggression towards people and animals, destruction of property, and serious violation of rules.

In contrast, other options represent behaviors that are typically not associated with conduct disorder. Compliance with authority and engaging in community service show adherence to societal norms and prosocial behavior, which are not indicative of this disorder. Displaying emotional vulnerability may suggest other psychological issues but does not align with the characteristics of conduct disorder, which is marked by an outward expression of defiance and aggression rather than sensitivity or vulnerability. Therefore, the act of lying to evade repercussions exemplifies the problematic behavior patterns that define conduct disorder.