You are answering a USMLE-style medical question. Question: A 24-year-old woman comes to the physician’s office with concerns about a recent pregnancy. She and her boyfriend had intercourse for the first time a few weeks ago. Two weeks ago she missed her menstrual period. She took several over the counter pregnancy tests that confirmed her pregnancy. She is tearful about the pregnancy and is very concerned. After extensive conversations with her physician and counseling, she decides she wants to medically abort her 6-week pregnancy. Which of the following drugs should be administered to this patient for this purpose? Options: A) Tamoxifen B) Terbutaline C) Mifepristone D) Copper intrauterine device Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.