<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 29-year-old woman presents to her gynecologist because of chronic pelvic pain that she has been experiencing for the last 6 months. Specifically, she says that she has severe pain during menstruation that is localized primarily to her lower abdomen and pelvis. In addition, she has been having pain while defecating and during intercourse. She has no past surgical history and her past medical history is significant for asthma. She uses protection while having intercourse with her long time boyfriend and has never been pregnant. Physical exam reveals adnexal tenderness and the presence of an adnexal mass. Laparoscopic examination is conducted showing several cysts filled with dark brown fluid on her ovaries and powder burn marks along her peritoneal surfaces. Which of the following markers would most likely be elevated in this patient?? A: Alpha-fetoprotein, B: Beta-hCG, C: Bombesin, D: CA-125, E: CA-19-9,  <response>: This is a clinical vignette describing a patient with chronic pelvic pain, dysmenorrhea, dyspareunia, and defecation pain. The history and physical exam findings of adnexal tenderness and adnexal mass along with the laparoscopic findings of ovarian cysts and powder burn lesions suggest this patient most likely has endometriosis. Endometriosis can cause pelvic pain and inflammation and can lead to the formation of ovarian cysts called endometriomas. Of the answer choices provided, CA-125 is a tumor marker that can be elevated in endometriosis and ovarian cancer. The other markers are not typically elevated in endometriosis.D: CA-125 