Problem: A 17-year-old girl presents with a thick discharge from her eyes that started 5 days ago. Associated symptoms include redness and a feeling of dirt in her eyes. Her eyes are usually matted in the morning. Her medical history is significant for multiple similar episodes. She has been using contact lenses for the past 2 years. Her vital signs are blood pressure 120/80 mm Hg, heart rate 88 bpm, respiratory rate 14 breaths/min, and temperature 37 °C (98.6 °F). An ocular examination reveals hyperemia and elevated yellow-white lesions at the lower cul-de-sac. What is the most appropriate next step in management? A. Topical neomycin B. Topical bacitracin C. Topical ciprofloxacin D. Oral azithromycin