A 42-year-old woman presents with fever, flank pain and vomiting. She has costovertebral angle tenderness and feels unwell. Urine dipstick is positive for nitrites and leucocytes. What is the most appropriate initial management?AAdmit for intravenous antibioticsBTreat with a 3-day course of trimethoprim at homeCOffer simple analgesia only and review if not better in 1 weekDArrange urgent renal ultrasound before treatmentEPrescribe topical oestrogen creamCheck my answer