I don’t want to say this is true, but I think he might have not understood that his father was dead.
Answer:
D. Snowball
Explanation:
In the book, it is stated that Snowball and Boxer get Animal Hero: First Class. While a sheep who died in battle gets Animal Hero: Second Class.
I believe it is the last answer choice, given from what I remember she had a close relationship with her father and viewed him highly.
It would have to be B, hope i was helpful today