question: Q:A 27-year-old woman presents to the emergency room with a rash over her shins for the last 3 months. She also has a swell in her knee and wrist joints on both sides for a few days. The rash is painful and erythematous. She had an episode of uveitis 6 months ago that was treated with topical therapy. She is not on any medication currently. In addition, she stated that 3 weeks ago she went hiking with her family and found a tick attached to her left thigh. Her vital signs include a blood pressure of 135/85 mm Hg, a pulse of 85/min, and a respiratory rate of 12/min. Physical examination shows swelling of the ankles, knees, and wrists bilaterally, and well-demarcated papules over the anterior aspect of both legs. A chest X-ray is performed and demonstrates bilateral hilar lymphadenopathy. Which of the following is the pathophysiologic mechanism behind this patient’s condition?? 
  {'A': 'Loss of protection against proteases', 'B': 'Formation of caseating granulomas', 'C': 'Release of toxins by spirochete', 'D': 'Activation of T lymphocytes', 'E': 'Activation of Langerhans cells'},