A 30-year-old woman presents with dysuria and urinary frequency for 2 days. She is otherwise healthy, not pregnant, and afebrile. Urine dipstick is positive for nitrites and leukocytes. What is the most appropriate management?AStart a 3-day course of oral NitrofurantoinBSend urine for culture only and await resultsCStart 10 days of broad-spectrum IV antibioticsDAdvise increased fluids only, with no antibioticsEArrange urgent renal ultrasoundCheck my answer