TH cells are the primary regulators of T-cell– and B-cell– mediated responses . They________
A.
express the CD4 coreceptor molecule
B.
recognize foreign antigen complexed with MHC class II molecules on B cells, macrophages, or other APCs
C.
aid effector T lymphocytes in cell mediated immunity
D.
aid antigen-stimulated subsets of B lymphocytes to proliferate and differentiate toward antibody-producing cells