Which of the following actions is the nurse's priority?

The correct answer is D: Check the child's daily weight. This is the priority because weight changes can indicate fluid retention or loss, which is crucial in managing the child's health. Monitoring weight helps assess the effectiveness of treatment and identify any worsening conditions promptly. Placing the child on a no-salt-added diet (A) may be important but is not the priority over monitoring weight. Educating parents about potential complications (B) is valuable but not as immediate as monitoring weight. Maintaining a saline-lock for possible medications (C) is important but not the priority over daily weight checks.