You are answering a USMLE-style medical question. Question: A 6-year-old boy is brought to the physician by his mother because of a 2-day history of dysuria and increased urinary frequency. Vital signs are within normal limits. Urinalysis shows cloudy, red urine. This patient's clinical presentation is best explained by an infection with a virus with which of the following features? Options: A) Non-enveloped with linear, single-stranded DNA B) Non-enveloped with linear, single-stranded RNA C) Enveloped with linear, single-stranded RNA D) Non-enveloped with linear, double-stranded DNA Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.