<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 6-year-old boy presents with fever, sore throat, hoarseness, and neck enlargement. The symptoms started 3 days ago and progressed gradually with an elevated temperature and swollen lymph nodes. His family immigrated recently from Honduras. He was born via spontaneous vaginal delivery at 39 weeks after an uneventful gestational period and he is now on a catch-up vaccination schedule. He lives with several family members, including his parents, in a small apartment. No one in the apartment smokes tobacco. On presentation, the patients blood pressure is 11075 mm Hg, heart rate is 103min, respiratory rate is 20min, and temperature is 39.4C 102.9F. On physical examination, the child is acrocyanotic and somnolent. There is widespread cervical edema and enlargement of the cervical lymph nodes. The tonsils are covered with a gray, thick membrane which spreads beyond the tonsillar bed and reveals bleeding, erythematous mucosa with gentle scraping. The lungs are clear to auscultation. Which of the following is the target of the virulence factor produced by the pathologic organism infecting this child?? A: SNAP-25, B: ADP-ribosylation factor 6, C: Eukaryotic elongation factor-2 eEF-2, D: Desmoglein, E: RNA polymerase II,  <response>: This is a clinical vignette describing a 6-year-old boy with fever, sore throat, hoarseness, and neck enlargement that started 3 days ago. The description of gray, thick membranes on the tonsils that spread beyond the tonsillar bed and bleed with gentle scraping is classic for diphtheria infection. Diphtheria is caused by Corynebacterium diphtheriae, which produces diphtheria toxin. This toxin inhibits protein synthesis by ADP-ribosylating eukaryotic elongation factor-2 eEF-2. Therefore, the target of the virulence factor produced by C. diphtheriae is eEF-2.C: Eukaryotic elongation factor-2 eEF-2 