The students were (angry or dissatisfied)
Bucks first encounter with the dogs would be his first day in the North. It has such a profound effect on him because he was taken from civilization to the wild , a primitive place.
I think that it would be "The principle of the school makes decisions based on this principals."
It would have been more accurate if it was written as "The principal of the school makes decisions based on this principles."
The answer is A that is correct