I think c) uses contrasts <span>between darkness and light to highlight his points.</span>
The correct answer is the last one, the cyclops is compared to a mast because of his size. The comparison means that even laid down the cyclops standed out among his sheep, like a mast does at sea. As for the first two options, the cyclops is not compared to Zeus in any moment.
A. Flash mobs seem both interesting and safe, unless participants are irresponsible.
Due to most of the corruption going on in the government
He feels disgusted by the wasteful nature of war.
Hope this helps!