A 58-year-old has 2 urine microscopies showing 5-10 RBC/HPF, no infection. He smokes and has hypertension. According to the latest urology guidance, how is microhematuria defined and initially risk-stratified?ADefined as ≥1 RBC/HPF; all need immediate cystoscopy and CT urogramBDefined as ≥3 RBC/HPF; use risk-based evaluation incorporating RBC count, age, smoking, and other factorsCDefined as ≥10 RBC/HPF; ultrasound onlyDDefined as dipstick-positive blood only; observationEDefined as any RBC/HPF; MRI urogram for allCheck my answer