$\gamma$ $\sigma$ T Cells May Be Important for Recognition of Common Antigens

Multiple Choice

$\gamma$ $\sigma$ T cells may be important for recognition of common antigens at epithelial boundaries between the host and the external environment.The $\gamma$ $\sigma$ T cells differ from the $\alpha$$\beta$ T cells in which one of the following ways?

A) ( $\gamma$ $\sigma$ ) T cells recognize only nonprotein antigens.
B) ( $\gamma$ $\sigma$ ) T cells are not MHC-restricted and do not recognize MHC-associated antigens.
C) The $\gamma$ $\sigma$ TCR complex contains CD3 $\gamma$ or CD3 $\sigma$ but not CD3? .
D) Most mature $\gamma$ $\sigma$ T cells express either CD4 or CD8 but not both.
E) ( $\gamma$ $\sigma$ ) T cells lack key biologic activities,including the ability to lyse target cells.