Yes the writer can I did this same thing
The answer is B. To inform
'Before they ate a snack' is the correct answer, it is the adverbial clause of time. A cannot be correct because that is an independent clause, and adverb clause has to be dependent. B isn't a clause at all.
The correct answer should be an Atlas.
Atlases are huge books filled with maps, most commonly political and geopolitical maps.
