The sentence that uses figurative language is "My day at school was a marathon and a triathlon combined." because this person's school day was obviously not a marathon/triathlon, but they use this to emphasize how tiring the day was.
I think that the best answer for this is A. Because he knew that the coldest snaps never froze these springs, and he knew likewise their danger. So in the end he knew they were traps. I hope this helps ;) you are welcome.
