<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 42-year-old man presents to his physician with dark urine and intermittent flank pain. He has no significant past medical history and generally is healthy. His temperature is 97.5F 36.4C, blood pressure is 182112 mmHg, pulse is 85min, respirations are 15min, and oxygen saturation is 98 on room air. Physical examination is significant for bilateral palpable flank masses and discomfort to percussion of the costovertebral angle. Urinalysis is positive for red blood cells without any bacteria or nitrites. Which of the following diagnostic modalities should be used to screen members of this patients family to assess if they are affected by the same condition?? A: Abdominal CT, B: Genetic sequencing, C: Renal biopsy, D: Renal ultrasound, E: Voiding cystourethrogram,  <response>: This is a question about diagnosing a familial kidney disorder. The patient is a 42-year-old man with dark urine, flank pain, hypertension, palpable flank masses, and microscopic hematuria. This presentation is most consistent with polycystic kidney disease. To screen family members for the same condition, a diagnostic modality that can detect cysts in the kidney should be used. D: Renal ultrasound 