Answer:
A) Character vs. character
Step-by-step explanation:
The type of conflict represented in the bolded line "the mice sat in council and talked of how they might outwit their enemy, the Cat" is "Character vs. character." In this line, the conflict is between the mice (characters) and their enemy, the Cat (another character). The mice are trying to figure out how to outsmart and protect themselves from the Cat, which is a conflict between characters.