Prioritizing Interventions for Chronic Constipation

A nurse is assessing a patient who has been experiencing chronic constipation. The patient reports infrequent bowel movements, minimal straining, and a sensation of incomplete evacuation. The nurse is formulating a plan of care that includes dietary modifications, increased fluid intake, and the use of over-the-counter remedies. Which of the following interventions should the nurse prioritize as the most important component for managing this patient's condition?