D is the only one that follows conventional grammar rules.
The rest are wrong because...
A- gooder is not a word
B- you are only comparing 2 things so you would say best, you would say better. The rule is 'good, better, best.' Best is only used to compare multiple things
C- You already said better so you don't need another adjective, more, to support that
It describes the type of novel the speaker likes.
Answer:
C
Explanation:
as specifically asking for black bear
The third choice is the answer