In a patient with panic disorder, which of the following symptoms severely restricts a person's ability to function and carry out daily activities, often leading to a significant decline in the quality of life?
• Excessive anxiety and worry occurring more days than not for at least 6 months
• Frequent episodes of intense fear occurring only in social situations
• Recurrent panic attacks that are exclusively triggered by exposure to specific phobic objects or situations
• Avoidance of situations that cause panic or where panic might be expected to occur
