question: Q:A 40-year-old man presents to a clinic in Michigan in December complaining of painful blue fingers and toes. He also complains of numbness and tingling. The patient’s vital signs are within normal limits, and his symptoms typically disappear when he comes back into a warm room. The patient also notes that he recently moved to the area from Arizona and had recently recovered from a viral infection in which he had a low-grade fever and severe lymphadenopathy. Which of the following tests would most likely be positive in this patient?? 
  {'A': 'Indirect Coomb’s test', 'B': 'Direct Coomb’s test with anti-IgG reagent', 'C': 'Direct Coomb’s test with anti-C3 reagent', 'D': 'Anti-centromere antibody', 'E': 'Anti-Ro antibody'},