A 27-year-old man is diagnosed with uncomplicated genital Chlamydia trachomatis infection after screening at a sexual health clinic. He has no allergies and no other STIs. What is the recommended first-line antibiotic regimen?AAzithromycin 1 g orally as a single doseBDoxycycline 100 mg orally twice daily for 7 daysCCiprofloxacin 500 mg orally twice daily for 3 daysDBenzathine penicillin G 1.8 million units IM onceEMetronidazole 2 g orally as a single doseCheck my answer