Can you show the story? That will be more helpful
Answer:
I think its A
dont judge me im in middle school
Explanation:
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.
Answer:
He is learning to stand up to his father.