C) Since there was a flicker fire in the cabin, I wonder if she [the glimmering girl] was actually there?
I'd say is a, since the point of a persuasive essay is to give your opinion backed up by research with proof typically, however due to the wording by saying 'references' I don't believe it's b.
Hoped it helped! c:
- Kat
What are your options is this a question?