<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A previously healthy 7-month-old boy presents with fever, chills, cough, runny nose, and watery eyes. He has a blood pressure of 11576 mm Hg, heart rate of 84min, and respiratory rate of 14min. Physical examination reveals clear lung sounds bilaterally. His mother reports that his brother has been having similar symptoms. A nasal swab is obtained, and he is diagnosed with influenza. Assuming that this is the childs first exposure to the influenza virus, which of the following immune mechanisms will most likely function to combat the viral infection?? A: Eosinophil-mediated lysis of infected cells, B: Virus-specific immunoglobulins to remove free virus, C: Complement-mediated lysis of infected cells, D: Presentation of viral peptides on MHC-II of CD4 T cells, E: Natural killer cell-induced lysis of infected cells,  <response>: This is a question about the immune response to a viral infection in a young child. The key details are that this is a 7-month-old boy with his first exposure to influenza virus. The choices describe different immune mechanisms. For a first viral infection in an infant, the innate immune system will respond first. NK cells and complement can lyse infected cells, but the main mechanism will be presentation of viral antigens on MHC-I to activate cytotoxic CD8 T cells. Eosinophils and immunoglobulins are part of the adaptive immune response, which develops later after repeat exposures. MHC-II presentation activates CD4 helper T cells, which is also part of the adaptive response.Therefore, the correct answer should describe an innate immune mechanism involving MHC-I presentation to CD8 T cells.E: Natural killer cell-induced lysis of infected cells 