A 32-year-old woman comes to your clinic 3 days after unprotected intercourse. She does not wish to become pregnant and is not on regular contraception. What is the MOST effective emergency contraceptive option at this time?ACombined oral contraceptive (Yuzpe regimen) within 72 hoursBCopper intrauterine device insertion within 7 daysCLevonorgestrel 1.5 mg single dose within 72 hours onlyDMifepristone single dose within 24 hours onlyENo option is effective after 72 hoursCheck my answer