Final answer:
The statement that indicates successful teaching about the iron supplement for a pregnant woman with iron deficiency anemia is: "I'll call the doctor if my stool is black and tarry."
Step-by-step explanation:
After teaching a pregnant woman with iron deficiency anemia about her prescribed iron supplement, a statement that indicates successful teaching is:
D) "I'll call the doctor if my stool is black and tarry."
Taking iron with milk (option A) is not recommended as milk can inhibit iron absorption. Drinking orange juice (option B) is actually beneficial as it contains vitamin C, which increases iron absorption. While foods high in fiber (option C) are important for overall health, they don't specifically relate to the iron supplement. However, it is crucial for the pregnant woman to monitor her stool for black and tarry consistency as it may indicate gastrointestinal bleeding, which is important to promptly report to the doctor.