By 'B 5' I mean Group B, l. 5, as numbered in the Chaucer Society's Six-text edition; the arrangement of which I have adopted throughout.
See note to l. 8 of the Prologue.
Except as regards convenience of reference. It was Dr. Furnivall who placed C more forward; nothing is gained by it, and it complicates references. I heartily wish this had never been done.
Tyrwhitt suggests the same thing, in a note to his Introductory Discourse.
In the Proem, the Nun calls herself an 'unworthy son of Eve'; G 62.