Positive Selection in T-Cell Education Refers To

Positive selection in T-cell education refers to:

A) T-cell receptors (TCR) that can bind strongly to self MHC proteins
B) CD8 receptors that can bind strongly to self MHC proteins
C) T-cell receptors (TCR) that can bind weakly to self MHC proteins
D) CD4 that can bind weakly to self MHC proteins
E) B-cell receptors that bind weakly to T-cell receptors