Which of the following statements are true of adaptive immunity? (Read carefully and select all of the correct statements.)

A)Antibody production is characteristic of both antibody-mediated and cell-mediated immunity.
B)Opsonization is a reaction of cell-mediated immunity that attracts macrophages.
C)Memory B cells provide the memory of a pathogen in cell-mediated immunity.
D)Helper T cells help out with phagocytosis.
E)Cytotoxic T cells destroy cellular antigens by producing toxic chemicals.
F)Complement fixation is triggered by antigen-antibody complexes.
G)Helper T cells work with macrophages in the recognition of foreign antigens.
H)Antibodies are proteins produced by plasma cells that have differentiated from B cells.