The LPN is checking for residual before administering enteral feeding through a PEG tube. Which of these steps is incorrect?

D The residual pH level is tested to ensure appropriate placement. C The residual should be discarded prior to administering the tube feeding. B If the residual is greater than 200 mL, the LPN should not administer the enteral feeding. A The LPN elevates the head of the bed at least 30 degrees.