A 31-year-old transgender woman on PrEP asks about taking doxycycline to reduce STI risk. She had rectal chlamydia twice in the past year. What is the recommended doxy-PEP regimen?ADoxycycline 100 mg once after sex, repeat daily for 7 daysBDoxycycline 200 mg as soon as possible within 72 hours after sex (max once per 24 h)CDoxycycline 200 mg only if a partner tests positive within 7 daysDDoxycycline 50 mg daily continuouslyENo role for doxycycline in STI preventionCheck my answer