Which of the following is a difference between B cells and T cells?

A)One has a major role in antibody production, while the other has a major role in cytotoxicity.
B)One binds a receptor called BCR (B-cell receptor), while the other recognizes a receptor called TCR (T-cell receptor).
C)B cells are activated by free-floating antigens in the blood or lymph. T cells are activated by membrane-bound antigens.
D)T cells are produced in the thymus and B cells are produced in the bone marrow.
E)B cells produce histamine while T cells produce complement.