T Cells Expressing $\gamma$ $\delta$ T-Cell Receptors Have Been Found to Recognize a Diversity of Found

T cells expressing $\gamma$ : $\delta$ T-cell receptors have been found to recognize a diversity of ligands, including pathogen-derived proteins, self-peptides, and stress-induced molecules. This pattern of antigen recognition shows similarity to that of iNKT cells and MAIT cells, suggesting that $\gamma$ : $\delta$ T cells:

A) Do not play an important role in immunity, but likely have a non-immune function
B) Share features of both innate and adaptive immune cells
C) Are only able to respond when the host is infected with a virus such as herpes simplex virus
D) Are involved in maintaining the integrity of endothelial cells in the host
E) Are most important in responses to tumor cells that show stress responses