You are answering a USMLE-style medical question. Question: A 75-year-old man presents to a medical clinic for evaluation of a large, tense, pruritic bulla on his inner thighs, abdomen, and lower abdomen. A skin biopsy is performed, which shows an epidermal basement membrane with immunoglobulin G (IgG) antibodies and linear immunofluorescence. Which of the following is the most likely cell junction to which the antibodies bind? Options: A) Desmosomes B) Gap junctions C) Hemidesmosomes D) Tight junctions Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.