<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A group of scientists studies the effects of cytokines on effector cells, including leukocytes. They observe that interleukin IL12 is secreted by antigen-presenting cells in response to bacterial lipopolysaccharide. Which of the following responses will a CD4 T cell produce when it is exposed to this interleukin?? A: Release of granzymes, B: Activation of B cells, C: Secretion of IL4, D: Cell-mediated immune response, E: Response to extracellular pathogens,  <response>: This is a question about the effects of interleukin-12 IL-12 on CD4 T cells. IL-12 is secreted by antigen-presenting cells in response to bacteria. It promotes cell-mediated immunity by stimulating CD4 T helper 1 Th1 cells. Th1 cells secrete cytokines like interferon gamma that activate macrophages and cytotoxic T cells. So the correct answer should be the one that describes a Th1 response mediated by IL-12.D: Cell-mediated immune response 