10. Which of the following cell activation sequences most accurately represents sensitization in type 1
hypersensitivity reaction?
(A) B cells stimulate cytotoxic T cells to activate T helper 1 cells.
(B) T helper 1 cells stimulate T helper 2 cells to activate class switching of B cells.
(C) Dendritic cells stimulate T helper 2 cells to activate class switching of B cells.
(D) Dendritic cells stimulate T helper 1 cells which activate cytotoxic T cells.
(E) cytotoxic T cells stimulate T helper 2 cells to activate class switching of B cells.