A nurse working at a clinic speaks on the telephone with a parent of a 2-month-old infant. The parent tells the nurse that the infant has projectile vomiting followed by hunger after meals. Which of the following responses by the nurse is appropriate?

A. "Give your infant an oral rehydrating solution.": Rehydration is important but does not address the underlying issue of possible pyloric stenosis. B. "Burp your child more frequently during feedings.": Burping does not resolve projectile vomiting, which may indicate a more serious condition. C. "Bring your infant into the clinic today to be seen.": Projectile vomiting and post-feeding hunger are signs of pyloric stenosis, which requires prompt evaluation. D. "You might want to try switching to a different formula.": Changing formula does not address the likely structural cause of vomiting.