Which of the Following Statements Are True of Adaptive Immunity

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.