The answer is A because you can use context clues
Answer: To show that it is a metaphor and not literal
Explanation:
''Talk the hind legs of a donkey'' is having a meaning ''making a donkey sit down on its rear end'' which is not something that donkeys do naturally. It is used when we are describing a person who is talking to much. This phrase has its origins in Ireland.
In this case, the author is considering that person can talk much about her tales.
The theme of The Count of Monte Cristo is revenge and forgiveness, power and powerlessness. When Dantes is given a life-prison sentence by his enemies, he spends every waking moment planning his revenge