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 cause of restlessness, grimacing, and drawing knees to the chest. 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 levels 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 is not the most appropriate action considering the presented symptoms. Administering the prescribed analgesic is more directly related to addressing the infant's discomfort.