<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:An 18-year-old woman presents to the emergency department with severe right lower quadrant discomfort and stomach pain for the past day. She has no significant past medical history. She states that she is sexually active and uses oral contraceptive pills for birth control. Her vital signs include: blood pressure 12781 mm Hg, pulse 101min, respiratory rate 19min, and temperature 39.0C 102.2F. Abdominal examination is significant for focal tenderness and guarding in the right lower quadrant. Blood is drawn for lab tests which reveal the following:Hb 13 gmdLTotal count WBC 15,400 mm3Differential countNeutrophils: Segmented 70Band Form 5Lymphocytes 20Monocytes 5 What is the next best step in the management of this patient?? A: Pelvic exam, B: Ultrasound of the pelvis, C: Ultrasound of the appendix, D: Upper gastrointestinal series, E: Upper gastrointestinal endoscopy,  <response>: This is a patient presenting with signs and symptoms of acute appendicitis, including right lower quadrant pain, fever, leukocytosis with neutrophilia. The question is asking about the next best diagnostic step.Choice A pelvic exam is not useful for diagnosing appendicitis. Choice B ultrasound of pelvis is a good initial imaging modality to evaluate for appendicitis.Choice C ultrasound of appendix specifically is even more targeted and appropriate. Choices D and E upper GI studies are not indicated or helpful for evaluating appendicitis.C: Ultrasound of the appendix 