A protagonist is the "Good guy" in a book, novel, etc. an antagonist it completely opposite of a protagonist an antagonist is the "Villian" in a story, book, novel, etc.
Hope I was able to help, ~Kashout kam
It would be D because we know more from that character.
Can you post the passage, so I can see it and then give you the answer.
The frigid weather and the long distance between one camp ground to camp ground cases a lot of problems from not knowing where you are to falling threw the snow and ice.