During the admission interview, the nurse learns that a newly admitted adult client has a six-month history of recurring somatic pain. Which problem is most important for the nurse to further explore with the client?

A. Injuries from falls are important but may not be directly related to somatic pain. B. Anxiety and restlessness can accompany chronic pain but are secondary to assessing emotional status. C. Nausea and vomiting are less commonly linked to somatic pain unless related to medication side effects. D. Feelings of depression are most important to explore because chronic pain is strongly associated with depression, which can worsen pain perception and affect overall quality of life. Early identification and management improve outcomes.