A significant symptom of post-traumatic stress disorder is?

Numbing of general responsiveness is a significant symptom of post-traumatic stress disorder (PTSD) because it reflects the emotional detachment and decreased ability to experience feelings that individuals with PTSD often encounter. This symptom manifests as a lack of interest in activities that were previously enjoyable, a diminished ability to connect with others emotionally, and a feeling of disconnection from oneself and the surrounding world. These reactions are the body's way of coping with trauma, as individuals may attempt to shield themselves from overwhelming emotions and memories associated with the traumatic event.

The other options do not accurately represent symptoms of PTSD. For example, exaggerated euphoria and persistent happiness are not typically associated with this condition, as the disorder more commonly involves negative emotional states such as sadness, anger, or fear. Constant paranoia, while it can sometimes occur in individuals with PTSD, is not a defining or significant symptom of the disorder. The focus on numbing emphasizes the profound impact that trauma can have on an individual's emotional and psychological well-being, which aligns with clinical understandings of PTSD.