A nurse is reinforcing teaching about pernicious anemia with a client following a total gastrectomy. Which of the following dietary supplements should the nurse include in the teaching as the treatment for pernicious anemia?

A. Iron: While iron absorption may be affected by gastrectomy, pernicious anemia specifically results from vitamin B12 deficiency due to loss of intrinsic factor. B. Vitamin B12: A total gastrectomy eliminates intrinsic factor production needed for B12 absorption, so lifelong B12 supplementation is required. C. Vitamin C: Important for iron absorption but not the treatment for pernicious anemia. D. Folate: Folate deficiency can cause anemia, but pernicious anemia is due to B12 deficiency, not folate.