The practical nurse (PN) is caring for a 3-month-old male infant two days after a pylorotomy and notices that the infant is restless, grimacing, and drawing his knees to his chest. What action should the PN implement?

A. Wrapping the infant with a warm blanket might provide comfort but may not directly address the signs of discomfort or pain. B. Giving the prescribed analgesic is essential to alleviate the infant's discomfort or pain following a surgical procedure like pylorotomy. C. Obtaining blood glucose level might be necessary in certain situations but does not directly address the observed signs of discomfort and pain in the infant. D. Burping the infant every two hours may relieve gas but does not address the symptoms of restlessness, grimacing, and drawing knees to the chest, which are indicative of pain or discomfort post-surgery.