After Teaching the Patient About Taking Oral Iron Preparations for a Moderate

After teaching the patient about taking oral iron preparations for a moderate iron-deficiency anemia, the nurse determines that additional instruction is needed when the patient says,

A) "I will call the doctor if my stools start to turn black."
B) "I will take a stool softener if I feel constipated occasionally."
C) "I will increase my fluid and fiber intake while I am taking the iron tablets."
D) "I should take the iron with orange juice about an hour before eating."