<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:Researchers are investigating the mechanism of cell apoptosis and host defense in mice. They have observed that mice with certain gene deletions are not able to fight the induced viral infection. They identify a cell that is able to destroy target cells infected with viruses by exocytosis of granule contents, which induces the activation of caspases. Which type of cell is responsible for this process?? A: Macrophages, B: Neutrophils, C: CD8 lymphocytes, D: CD4 lymphocytes, E: Eosinophils,  <response>: This question is asking about a type of cell that is able to destroy virus-infected target cells through exocytosis of granules, leading to caspase activation and apoptosis. This process of killing infected cells is characteristic of cytotoxic T cells, specifically CD8 T cells. Macrophages and neutrophils can phagocytose infected cells but do not kill through granule exocytosis. CD4 T cells are helper cells that activate other immune cells but do not directly kill infected cells themselves. Eosinophils may release granules but are not cytotoxic for virus-infected cells.C: CD8 lymphocytes 