<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 43-year-old woman, gravida 2, para 2, comes to the physician because of a 6-month history of heavy, irregular menstrual bleeding. Pelvic examination shows blood and clots in the posterior fornix and normal-appearing internal and external genitalia. An endometrial biopsy specimen shows straight uniform tubular glands lined with tall pseudostratified columnar epithelial cells with high mitotic activity embedded in an edematous stroma. Increased activity of which of the following is directly responsible for the histologic appearance of the biopsy specimen?? A: Luteinizing hormone, B: Corpus luteum, C: 5-alpha-reductase, D: Theca externa cells, E: Aromatase,  <response>: This is a medical question asking about the histologic appearance of an endometrial biopsy specimen from a 43-year-old woman with heavy, irregular menstrual bleeding. The biopsy shows straight uniform tubular glands with tall pseudostratified columnar epithelial cells that have high mitotic activity in an edematous stroma. Based on the description, this indicates endometrial hyperplasia, which is caused by increased estrogen stimulation of the endometrium. Therefore, we need to identify which choice is responsible for increased estrogen production.Luteinizing hormone LH stimulates ovulation and progesterone production by the corpus luteum. Corpus luteum produces progesterone. 5-alpha-reductase and theca externa cells are involved in androgen production. Aromatase converts androgens to estrogens, so increased aromatase activity would increase estrogen levels and cause endometrial hyperplasia.E: Aromatase 