question: Q:A previously healthy 3-year-old boy is brought to the physician by his mother because of a headache, fever, and facial pain that started 10 days ago. The symptoms initially improved but have gotten significantly worse over the past 2 days. Immunizations are up-to-date. His temperature is 39.1°C (102.3°F). Physical examination shows tenderness to palpation over both cheeks. Gram stain of a nasal swab shows small, gram-negative coccobacilli. Which of the following most likely accounts for this patient's infection with the causal pathogen?? 
  {'A': 'Causal pathogen produces phospholipase C', 'B': 'Host has hyperviscous secretions', 'C': 'Causal pathogen is unencapsulated', 'D': 'Causal pathogen expresses protein A', 'E': 'Host has impaired splenic opsonization\n"'},