The answer is A) Arrival
They are gathering hope this helps! :)
Okay, so this is a little hard to answer when you do not have the excerpts, but I will try my best to work a answer out of the headings. I think your answer would be C. It makes sense, the info that comes after the titles, so If I were you I would go with C.
I hope that helps.
The themes of a story contains well its like a background for it. The Symbols are kinda like the themes but its not completely (im so sorry)
Possibly C: Chronological or Sequential Order.
Hope this helps!