<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 presents to her physicians office complaining of fatigue and light headedness for one month. She has regular periods but notes that they have become heavier in the last year. She endorses increased urination and feels that she has gained weight in her abdomen, but review of systems is otherwise negative. She is a daycare teacher and has a first cousin with von Willebrand disease. Temperature is 98.4F 36.9C, pulse is 92min, blood pressure is 10972 mmHg, and respirations are 14min.A CBC demonstrates:Hemoglobin: 9.9 gdLLeukocyte count: 6,300mm3Platelet count: 180,000mm3Which of the following is the best next step to evaluate the etiology of this patients findings?? A: Pelvic ultrasound, B: TSH, C: Hysteroscopy, D: Parvovirus B19 IgM and IgG, E: von Willebrand factor antigen,  <response>: This patient is a 43-year-old woman with fatigue, lightheadedness, heavy menstrual periods, increased urination, and abdominal weight gain. She has a family history of von Willebrand disease. Her vital signs are normal. Her CBC shows a low hemoglobin, normal leukocyte count, and normal platelet count. The heavy menstrual periods suggest abnormal uterine bleeding as a possible cause of the anemia. The increased urination and abdominal weight gain raise suspicion for possible uterine fibroids or endometrial abnormalities causing the heavy periods. Choice A, pelvic ultrasound, would allow visualization of the uterus and ovaries to look for fibroids or other structural abnormalities that could be causing heavy periods. This would be the best next step to evaluate the etiology of her symptoms.Choice B, TSH, would not explain her heavy periods. Choices C and E are specific tests for uterine abnormalities and bleeding disorders that are premature prior to pelvic imaging. Choice D tests for parvovirus which does not explain her presentation.A: Pelvic ultrasound 