General Medicine General 4e35cf04 A 49-year-old female presents with signs of anemia and states that every morning her urine is dark. Workup reveals that her red blood cells lyse in vitro with acid (positive Ham's test). What is the best diagnosis for this patient? A Warm autoimmune hemolytic anemia B Paroxysmal nocturnal hemoglobinuria C Paroxysmal cold hemoglobinuria D Cold-agglutinin autoimmune hemolytic anemia