Answer:
C. The distant roar of the ocean soothed me to sleep.
Step-by-step explanation:
So A. is mostly dialogue, to that's a hard no. B. is just wondering, she's just thinking, we don't know anything about the scene or the context of the situation so that's a no. D. is a borderline, but I think that's more characterization, it doesn't give context or any clues on where she is. So in my opinion, C. is the right one
hope this helps:)