question: Q:A 10-year-old male presents with his mother with multiple complaints. A few weeks ago, he had a sore throat for several days that improved without specific therapy. Additionally, over the past several days he has experienced pain in his ankles and wrists and, more recently, his left knee. His mother also noted several bumps on both of his elbows, and he has also had some pain in his center of his chest. He thinks the pain is better when he leans forward. On physical examination, he is noted to be mildly febrile, and a pericardial friction rub is auscultated. Which of the following histopathologic findings is most likely associated with this patient's condition?? 
  {'A': 'Atypical lymphocytes noted on peripheral blood smear with an initial positive heterophil antibody test', 'B': 'Plasmodium falciparum ring forms in red blood cells on peripheral blood smear', 'C': 'Needle-shaped, negatively birefringent crystal deposits surrounded by palisading histiocytes in the synovial fluid of an affected joint', 'D': 'Interstitial myocardial granulomas containing plump macrophages with nuclei incorporating central wavy ribbons of chromatin', 'E': 'Sterile vegetations on both the ventricular and atrial aspects of the mitral valve, a proliferative glomerulonephritis, and serum anti-dsDNA and anti-Sm positivity'},