37. What are the major roles of antibody in immunity? (A) Activation of phagocytotic cells, induding neutrophils and macrophages (B) When bound to antigens on the surface of a virus, antibodyneutralizes it by blocking its ability to bind to a host cell(C) Binding of antibody to antigen on the surface of bacteria promotes phagocytosis by macrophages(D) Induction of inflammatory response
(E) Binding of antibody to antigen on surface of foreign cell activates the complement system, which forms membrane attack complex