A nurse is administering continuous enteral feedings for a client through a percutaneous esophageal gastrostomy (PEG) tube. Which of the following actions should the nurse take?

Check gastric residuals every 8 hr.

Return gastric contents if residual is less than 250 mL.

Measure the pH of gastric residual every 24 hr.

Flush the tube with 15 mL of water every 4 hr.