The client diagnosed with somatic symptom disorder (SSD) asks the nurse, "What causes this condition?" Which response by the nurse would be most accurate?

A. "Exposure to environmental toxins is a contributing factor.": Somatic symptom disorder is not caused by exposure to toxins. Its development is more closely linked to psychological and emotional factors rather than environmental exposures. B. "The symptoms reflect an underlying emotion that cannot be verbalized.": SSD often arises when individuals experience psychological distress that is unconsciously expressed through physical symptoms, because they are unable to process or verbalize their emotions effectively. C. "The symptoms reflect hypoarousal caused by chronic stress.": While stress can exacerbate somatic symptoms, the core mechanism in SSD is not hypoarousal. Instead, heightened attention and sensitivity to bodily sensations are more characteristic. D. "The Symptoms reflect an internal preoccupation with events.": Clients with SSD are preoccupied with physical symptoms, not general events. Their focus is on the body and illness-related concerns rather than external happenings.