Central (primary) lymphoid organs a. are efficient in exposing t-cells to foreign antigen. d. are the primary site of antibody synthesis and maturation, c. filt

Central (primary) lymphoid organs a. are efficient in exposing T-cells to foreign antigen. D. are the primary site of antibody synthesis and maturation, C. filter blood and trap blood-borne antigens. a. provide the microenvironment for synthesis and maturation of T and B-cells.