[Expert Solution]: A 3-week old is brought to the emergency…

A 3-week old is brought to the emergency department with a history of fussiness, spitting up, crying, and watery stools. Assessment reveals an alert child with moist mucous membranes. Which of the following should be the priority? A. Medicate with ondansetron for emesis B. Identify the type of feeding the caregiver uses C. Obtain a stool specimen for culture D. Initiate intravenous access with 0.9% sodium chloride