Gamma-Delta T Cells Differ from Other T Cells in That

Gamma-delta T cells differ from other T cells in that ________.

A) they can be directly activated by PAMPs,whereas other T cells have to be presented with the antigen in conjunction with an MHC molecule on an antigen-presenting cell
B) they do not have T cell-receptors to bind to antigens
C) they do not produce memory cells,unlike the T helper and T cytotoxic cells
D) they can react against cancer cells,whereas the other T cells can only target bacteria and viral-infected cells