Below are two statements about the immune system: Macrophages ingest and degrade microbes and present the microbial antigens to other immune system cells. Antibodies on the surface of virally infected host cells activate natural killer (NK) cells. These two statements are examples of the connections between which of the following? Choose one: A. neutrophil extracellular traps (NETs) and the disease lupus B. primary and secondary lymphoid tissues C. innate and adaptive branches of immunity D. phagocytosis and inflammation
