The nurse is caring for the client who has iron deficiency anemia. Which of the following statements indicate the client understands the instructions? Select the 3 statements that apply.

Teaching for iron deficiency anemia focuses on improving iron replacement therapy and preventing recurrence through diet and medication adherence. Oral Ferrous sulfate is commonly prescribed to restore hemoglobin and iron stores, but clients should understand expected side effects and correct administration techniques. Dietary changes are also important, especially for clients following vegan diets where iron intake may be limited. Proper education improves absorption, reduces complications, and supports recovery. A. Black stools are an expected and harmless side effect of oral iron supplementation. Iron changes stool color due to unabsorbed iron passing through the gastrointestinal tract. Clients should be taught this in advance so they do not mistake it for gastrointestinal bleeding and stop the medication unnecessarily. B. Ringing in the ears (tinnitus) is not a common effect of iron supplementation and is more commonly associated with medications such as salicylates or ototoxic drugs. Ferrous sulfate usually causes gastrointestinal side effects such as constipation, nausea, and dark stools rather than auditory symptoms. Therefore, this does not reflect correct understanding. C. Swelling in the feet is not an expected effect of iron therapy and may indicate fluid retention, cardiac issues, or another unrelated problem requiring evaluation. Iron supplements do not normally cause peripheral edema. This statement suggests misunderstanding of expected medication effects. D. Taking the iron supplement 1 hour before a meal is correct because iron is best absorbed on an empty stomach in an acidic environment. Food can decrease absorption, especially calcium-rich products. Although it may be taken with food if gastrointestinal upset occurs, the preferred teaching is administration before meals. E. Increasing green leafy vegetables is correct because foods such as spinach, kale, and other leafy greens provide non-heme iron and support correction of iron deficiency anemia. Since the client follows a vegan diet, plant-based iron sources are especially important for maintaining adequate iron intake and preventing recurrence.