More than likely C. I think this because Wild animals tend to live closer to the center of the island, because their instincts tell them that the island will flood someday. Hope this helped! Thanks!
~Steve
"Contrast" means to be different, or to differ. The answer is D. However, because "however" is used when you start to talk about something different.
I hope this helps! :D
The main theme is the fragility of sanity, guilt versus innocence, and the unrelenting passage of time. The fragility of sanity: the narrator's attempt to prove his sanity, his erratic mannerisms while he explains his meticulous plans for killing the old man only prove his madness.
