What is a memory cell?
A) a phagocyte that binds to a specific antigen and engulfs the cell with that antigen
B) a plasma cell that releases large amounts of a specific antibody into the bloodstream
C) a B cell that binds to antigens that are structurally different from the initial antigen
D) a T cell that supplies B cells with antibodies that match an antigen from a previous infection
E) a lymphocyte that recognizes a specific antigen long after initial exposure to the pathogen
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