A nurse is planning care for a 5-month-old infant who is scheduled for a lumbar puncture to rule out meningitis. Which of the following actions should the nurse include in the plan of care?

A. Applying lidocaine/prilocaine cream 10 minutes prior would not be sufficient; it generally requires 30–60 minutes to be effective. B. Flexing the chin to the chest and knees to the abdomen is the correct positioning for an infant during a lumbar puncture. C. Keeping an infant NPO for 6 hours is unnecessary before a lumbar puncture. D. Placing the infant in an infant seat post-procedure is not required; flat positioning is generally advised.