A nurse is caring for a client who has opioid use disorder and is experiencing withdrawal. Which of the following manifestations should the nurse expect?

A. Weight gain: Opioid withdrawal typically causes weight loss due to decreased appetite and gastrointestinal upset, rather than weight gain. B. Yawning: Frequent yawning is a common early manifestation of opioid withdrawal, reflecting autonomic hyperactivity and central nervous system changes as the body adjusts to the absence of the opioid. C. Constipation: Opioid withdrawal usually causes diarrhea rather than constipation, as opioid-induced bowel hypomotility resolves when the drug is discontinued. D. Somnolence: Withdrawal is associated with hyperactivity, anxiety, and insomnia rather than excessive sleepiness. Somnolence is more characteristic of opioid intoxication.