You are answering a USMLE-style medical question. Question: A 63-year-old female complains of weakness, light-headedness, palpitations, and soreness of the tongue. She has a past medical history of Hashimoto’s thyroiditis. Her hematocrit is 29%. On peripheral blood smear, you notice neutrophils with 7 lobes and large oval-shaped red blood cells. On physical exam, you notice the patient has decreased position sense and a loss in vibratory sensation in her lower extremities. Which of the following is most likely present in this patient? Options: A) Atrophy of G cells B) Anti-intrinsic factor antibodies C) Decreased methylmalonic acid levels D) Antithrombotic state Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.