You may well ask, especially since this sentence was created by the Pearson editors, who usually like to use "you all" for ihr. (It's not the way the public course created by the volunteer contributors does it.)
Different English speakers express second person plural in different ways -- "you, you all, y'all, yinz, ye, all y'all, .....".
In the public course, we use simply "you".
In the Pearson sentences, they tend to use "you all".
(And since you can't guess whether a given sentence is an "official" sentence from the public course, or one from the Pearson course that is unfortunately visible to the public, you can only guess what will be accepted in a given sentence.)
You can report your variant if you wish; perhaps a Pearson editor will see the report and add "you all" as an accepted variant.
Yes, it does.
I'm not sure how to describe it, but basically in the "either/or" version, the voice rises until "Männer oder" and then falls abruptly before "Jungen", while in the "yes/no" version, the voice rises a bit to "Männer", dips a bit for "oder", and then rises further before "Jungen" (which is at the same pitch as "Männer" was in the either/or version).