Final answer:
The most appropriate intervention to decrease the risk of bowel perforation in a client with acute diverticulitis is avoiding the use of opioid analgesics (Option 1).
Step-by-step explanation:
Opioids can slow down bowel motility, which might exacerbate the condition and increase the risk of complications, including perforation. While a high-fiber diet is typically recommended for diverticulitis in the chronic phase to prevent recurrence, during the acute phase, a clear liquid or low-fiber diet is often suggested to rest the bowel.
Enemas might further irritate the inflamed bowel. Instructing the client to avoid coughing is beneficial for reducing intra-abdominal pressure but isn't the primary intervention to prevent bowel perforation in acute diverticulitis.