You are answering a USMLE-style medical question. Question: An investigator is studying cellular regeneration of epithelial cells. She has obtained a tissue sample from a normal thyroid gland for histopathologic examination. It shows follicles lined by a single layer of cube-like cells with large central nuclei. Which of the following parts of the female reproductive tract is also lined by this type of epithelium? Options: A) Ovaries B) Vagina C) Fallopian tubes D) Vulva Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.