which of the following among a-d is false concerning the adaptive immune response?
A. B cells mostly mediate humoral immunity and T cells mostly mediate cellular immunity.
B. B cells can differentiate into antibody-secreting plasma cells.
C. A clonal population of plasma cells can produce antibodies to many different epitopes.
D. T cells can directly kill infected host cells but B cells themselves cannot directly kill cells.
E. None are false; A-D are all true