Answer:
shady is the adjective in the sentence.
I would have to say B, due to not getting to hear the audio I am merely assuming.
He used riddling to talk to Smaug I think because he wanted to stall and waste time as he figured out a plan. He also used riddles to talk to Golem who he clearly was trying to stall to save himself as Golem wanted to kill and eat Bilbo. So it is a reoccurring theme of Bilbo and it makes sense.
The correct answer is A, this is true. If it is unstressed, then it is a feminine rhyme.
The answer is C, though I maybe wrong. I hope this helps you. (And sorry if it doesn’t)