In caring for a critically ill client with a nasogastric tube (NGT) for enteral feeding, which action by the nurse demonstrates competency in NGT care? Select all that apply.

B The nurse maintains the client in a low Fowler's position during feeding. D The tubing is changed every 48 hours or when the bag appears visibly soiled. A The nurse checks gastric residual every 4 hours for continuous feedings. E The nurse returns the residual to the stomach unless the volume is greater than 250 mL. C The nurse checks gastric residual before each bolus or intermittent feeding.