The adaption they use is literary adaption in which the authors in which they adapt a literary source to another genre.
An art song is usually for solo voice and is accompanied by solo piano. (Just as a side note, I recommend listening to the Erlking by Schubert if you have time; it's a German art song (lied))
The suitors would not marry his mother.
I believe it’s A. I hope that’s right!
