I thinks it's either D or A you can choose wich one u like but it is d or a
I think the author established anger as the mood in the excerpt. It is noticeable how the character is furious (for whatever reason) and shows her emotions by tearing that thin handkerchief into ribbons.
Hope this helps :)
Snowball and Napoleon were the most intelligent and active of all the animals at the farm. The fact that they even argued about those suggestions they seemed to agree with, clearly shows that there was an underlying fight for power between them. There was a need to show that they were somehow not part of the same mind, by means of opposing to whatever the other one suggested.