I think it's B) because a missing modifier is when a sentence is broke apart incorrectly and I don't think that B) is correctly separated. I could rearrange the sentence and make it say, "The thunder frightened me as I slept peacefully" and it would sound better. I hope I helped a bit.
Answer:
Hmmm... I don't see the screenshots!
If you upload them and make me Brainlest, I will answer you! But make sure to mark me Brainlest!
Thank you and Happy Easter!!!!
-DSK
Explanation:
A. avis : bee avis is latin