During the secondary response to antigens following a previous initial exposure,
A) IgM molecules first appear in the bloodstream, followed by a slow rise in IgG.
B) an immediate rise in IgG concentrations occurs.
C) the antigen must first activate the appropriate B cells.
D) the antibody levels do not peak until one to two weeks after antigen exposure.
E) memory B cells do not differentiate into plasma cells.
B) an immediate rise in IgG concentrations occurs.
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