A 35-year-old woman presents with fever, flank pain and dysuria. She is systemically unwell with temperature 39.5 °C but haemodynamically stable. Urinalysis shows nitrites and leukocytes. Which empirical regimen is most appropriate?AOral trimethoprim 300 mg once daily for 3 daysBSingle-dose fosfomycin onlyCOral ciprofloxacin 250 mg twice daily for 3 daysDInitial intravenous ceftriaxone followed by oral therapy once improvingENo antibiotics; treat with fluids aloneCheck my answer