Which of the Following Statements Regarding Positive Selection Is Correct

Which of the following statements regarding positive selection is correct?

A) All subsets of developing T cells undergo positive selection before export to the peripheral circulation.
B) T-cell receptor editing is linked to the process of positive selection.
C) Positive selection results in the production of T cells bearing T-cell receptors that have the capacity to interact with all allotypes of MHC class I and class II molecules,and not just those of the individual.
D) Positive selection ensures that autoreactive T cells are rendered non-responsive.
E) If there is a genetic defect in AIRE,then T-cell development is arrested as positive selection commences.