A. B-cells mature in bone marrow, and T cells mature in the thymus, and both B and T cells recognize and respond to particular pathogens.
B. B-cells mature in bone marrow, and T cells mature in the thymus, and both B and T cells recognize and respond to particular lymphocytesens.
C. B-cells mature in bone , and T cells mature in the thymus, and both B and T cells recognize and respond to particular pathogens.
D. B-cells mature in bone , and T cells mature in the thymus, and both B and T cells recognize and respond to particular lymphocytes.