The schematic drawing below summarizes the differentiation of naïve helper T cells (TH cells) into various effector T cells, which occurs in a peripheral lymphoid organ. Indicate which effector cell (A to E) in the drawing is better described by each of the following descriptions. Your answer would be a four-letter string composed of letters A to E only, e.g. DEAE.

( ) It can also develop from thymocytes in the thymus, as well as from naïve TH cells.
( ) It suppresses the development, activation, or function of most other immune cells.
( ) It produces IFN? and activates macrophages.
( ) They reside in lymphoid follicles close to developing B cells.