Which of the Following Statements Are True of Adaptive Immunity

Which of the following statements are true of adaptive immunity (Select all that apply) ?

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.