A nurse is caring for a 6-week-old infant who has a pyloric stenosis. Which of the following clinical manifestations should the nurse expect?

A. Projectile vomiting is a classic sign of pyloric stenosis due to the obstruction of the pylorus, which prevents normal stomach emptying. B. A ridged abdomen is not specific to pyloric stenosis; it may indicate other abdominal issues. C. Red currant jelly stools are associated with intussusception, not pyloric stenosis. D. Distended neck veins are typically associated with right-sided heart failure or fluid overload, not pyloric stenosis.