Iffy question, because it's assumption of answer (c) vs assumption (d). I got it right originally, and then got it wrong in blind review because I said to myself "if we're making assumptions, how could an actor NOT have a copy of Hamlet? vs spectator just be a fanatic about a character's role?" It's really funny how watching the video, the explanation actually touched on this question. If you were frustrated with this question, welcome to the club :)

#5, I did not want to assume spellcasters means wizards, so I decided not to include this one as part of the chain. My chain ignored "9th level → more to learn" but otherwise was mostly correct. I wonder if anyone else felt the same way?

Interested as well! Thanks!