A toddler has a small-bore tube for tube feeding and requires a medication in suspension form. Which action by the nurse is the most important preventive action to maintain patency of the tube?
A. Flushing after the medication with an adequate amount of fluid
B. Dissolving all tablets completely in warm water before giving them
C. Checking for placement by aspiration of the small-bore tube
D. Elevating the head of the toddler's bed at least 45 degrees