Problem: A 16-year-old girl presents to the office for a follow-up exam two weeks following sexual assault. The patient was administered emergency contraception only, as she denied prophylaxis against sexually transmitted infections. The patient's last immunization was at the age of 5. Laboratory analysis reveals the presence of anti-Hbs antibodies only. Which of the following vaccines should be administered to the patient, given her recent history of sexual assault? A. Hepatitis B vaccine B. Hepatitis C vaccine C. Human papillomavirus vaccine D. Pneumococcal vaccine