A 72-year-old nursing home resident with an indwelling catheter has pyuria and bacteriuria (100,000 CFU/mL E. coli) on routine screening but no urinary symptoms. What is the best next step?AObtain renal ultrasound and treat with TMP-SMXBDo not treat; no antibiotics indicatedCStart nitrofurantoin 100 mg twice daily for 5 daysDStart amoxicillin-clavulanate 875/125 mg twice daily for 7 daysEReplace catheter and start ciprofloxacin 500 mg twice dailyCheck my answer