What intervention should the practical nurse (PN) implement when taking the rectal temperature of an adult client?

A. Hold the thermometer the entire time while taking the temperature: Holding the thermometer or probe prevents it from being inadvertently displaced or pushed further into the rectum by peristalsis or client movement, which could lead to rectal perforation or injury to the delicate anal and rectal tissues. B. Place the client in the right Fowler's position: The right lateral (Sims’) position, not Fowler’s, is recommended for rectal temperature measurement. Positioning in Fowler’s does not provide optimal access or safety for this procedure. C. Lubricate the tip of the thermometer with water: The tip of the rectal thermometer or probe must be lubricated with a water-soluble lubricant (e.g., K-Y Jelly), not just water. Lubrication significantly reduces friction and discomfort upon insertion, thereby minimizing the risk of irritation or trauma to the rectal mucosa. D. Gently insert the thermometer 3 inches into the rectum: Inserting the thermometer too far can cause rectal trauma. The recommended depth for an adult is approximately 1–1.5 inches; 3 inches is excessive.