Question: A 22-year-old woman is seen in the emergency department (ED) with a 1-day history of lower abdominal pain and vaginal spotting. Her vital signs include a heart rate of 100 beats per minute and blood pressure of 100/60 mm Hg. Which of the following tests is the best next step? Want Assignment Help? OA Pelvic ultrasound OB Kidneys, ureters, and bladder (KUB) radiograph OC Human chorionic gonadotropin (hCG) level OD Chlamydia antigen test of the cervix