Pelvic Inflammatory Disease — Cervical Motion Tenderness

A 24-year-old woman presents to the emergency department with a 3-day history of lower abdominal pain and vaginal discharge. She is sexually active with multiple partners and has not used barrier contraception. On bimanual pelvic examination, the structure marked **A** is elicited — the patient winces and jumps when the cervix is moved during the examination. Her temperature is 38.5°C. Cervical swabs are sent for nucleic acid amplification testing. Based on the clinical findings, which of the following is the most appropriate empiric antibiotic regimen according to CDC 2021 guidelines for outpatient management?