Which of the Following Statements Are True of a T

Which of the following statements are true of a T cell that expresses two α chains (and thus two different T-cell receptors) as a result of ineffective allelic exclusion of the α chain during rearrangement? (Select all that apply.)

A) Engaging either of the T-cell receptors on MHC molecules of the thymic epithelium will result in positive selection.
B) One of the T-cell receptors will be functional while the other will most probably be non-functional.
C) If either T-cell receptor binds strongly to self-peptides presented by self-MHC molecules,the thymocyte will be negatively selected.
D) One of the T-cell receptors may be autoreactive but escape negative selection because its peptide antigen is present in tissues other than the thymus.
E) Subsequent gene rearrangements may give rise to a γ:δ T-cell receptor.