question: Q:A 70-year-old woman is brought to the emergency department 1 hour after being found unconscious in her apartment by her neighbor. No medical history is currently available. Her temperature is 37.2°C (99.0°F), pulse is 120/min, respirations are 18/min, and blood pressure is 70/50 mm Hg. Laboratory studies show a glomerular filtration rate of 70 mL/min/1.73 m2 (N > 90) and an increased filtration fraction. Which of the following is the most likely cause of this patient's findings?? 
  {'A': 'Pyelonephritis', 'B': 'Nephrolithiasis', 'C': 'Profuse diarrhea', 'D': 'Salicylate poisoning', 'E': 'Multiple myeloma'},