32. Which of the following is a feature of regulatory T cells (Treg)? (Select all that apply.)
(A) Treg express CD8 and control effector cells by inducing apoptosis
(B) Treg express high levels of CD25 (IL-2 receptor a (alpha) chain) and secrete pro-inflammatorycytokines such as IFN-y (gamma)
(C) Physical association between Treg and their target cells is mandatory for Treg function
(D) By interacting with dendritic cells in secondary lymphoid tissue, Treg prevent the interaction andactivation of naive T cells
(E) Treg secrete TGF-B (beta) and suppress effector T-cell function