A 26-year-old man presents with dysuria and urethral discharge after unprotected intercourse. NAAT for Chlamydia trachomatis is positive and gonorrhoea negative. According to Canadian STI guidelines, what is the recommended first-line treatment?AAzithromycin 1 g orally in a single doseBDoxycycline 100 mg orally twice daily for 7 daysCCiprofloxacin 500 mg orally onceDBenzathine penicillin G intramuscularlyENo antibiotics; observe and repeat testingCheck my answer