First off, such a hard worker for studying on Christmas.
Second, A) it's really hard to see the question and answer choices and B) your picture doesn't even show choice B.
Third, in these instances you are given four structures and you know that it's an acid-catalyzed degradation of some complex molecule. Go through the four structures and see if you either draw or envision acid-catalyzed breakdown of those molecules. Where are the most reactive sites in each molecule?