A client who is scheduled for a barium swallow asks the nurse why a laxative is necessary following the procedure. Which of the following responses should the nurse make?

Rationale: A. The color change of stool is not the purpose of the laxative. B. A laxative is necessary to help eliminate barium from the gastrointestinal tract, preventing constipation or impaction. C. The laxative is not used to prevent magnesium absorption; this is unrelated to a barium study. D. While facilities have protocols, the explanation should focus on patient safety and the purpose of the intervention, not just policy.