Which Statement Best Describes the Difference in Responses of Effector

Multiple Choice

Which statement best describes the difference in responses of effector B cells (or plasma cells) and cytotoxic T cells?

A) Effector B cells confer active immunity; cytotoxic T cells confer passive immunity.
B) Effector B cells kill pathogens directly; cytotoxic T cells kill host cells.
C) Effector B cells secrete antibodies that are specific for a certain pathogen; cytotoxic T cells kill pathogen-infected host cells.
D) Effector B cells carry out the cell-mediated response; cytotoxic T cells carry out the humoral response.
E) Effector B cells respond only the first time a pathogen is present; cytotoxic T cells respond subsequent times.