You are answering a USMLE-style medical question. Question: A 37-year-old primigravid woman at 12 weeks' gestation comes to the emergency department because of vaginal bleeding and dull suprapubic pain for 3 hours. She has had spotting during the last 3 days. Her medications include folic acid and a multivitamin. She has smoked one pack of cigarettes daily for 15 years. Her temperature is 37°C (98.6°F), pulse is 110/min, and blood pressure is 89/65 mm Hg. Pelvic examination shows a dilated cervical os and a uterus consistent in size with an 11-week gestation. Ultrasonography shows an embryo of 4 cm in crown-rump length and no fetal cardiac activity. Which of the following is the most appropriate next step in management? Options: A) Misoprostol therapy B) Methotrexate therapy C) Dilation and curettage D) Complete bed rest Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.