The nurse is providing postoperative teaching to a client on ways to prevent constipation. Which information should the nurse include?

A. Drink 800 to 1,000 milliliters of fluid daily: Adequate hydration is important to prevent constipation, but the recommended daily fluid intake for adults is typically at least 2,000–3,000 milliliters unless contraindicated by medical conditions. Advising only 800–1,000 mL is insufficient to maintain stool softness and does not provide effective constipation prevention. B. Add fat containing foods in diet to lubricate stools for easier passage: While dietary fat can facilitate digestion, increasing fat intake specifically to lubricate stools is not a standard recommendation for preventing postoperative constipation. Excessive fat may lead to GI upset and is not a reliable preventive strategy compared with fiber, hydration, and activity. C. Ambulate early and as frequently as possible: Early and frequent ambulation stimulates bowel motility, enhances peristalsis, and helps prevent postoperative constipation. Physical activity encourages movement of intestinal contents, counteracting the effects of anesthesia, opioid analgesics, and immobility, which are common causes of delayed bowel function after surgery. D. Take oxycodone as scheduled to prevent painful bowel movements: Oxycodone is an opioid analgesic that actually increases the risk of constipation by slowing gastrointestinal motility. Taking it as scheduled does not prevent constipation and may worsen it. Instead, clients should be instructed on prophylactic measures such as stool softeners, fiber intake, hydration, and ambulation to counter opioid-induced constipation.