The correct answer to the following question will be option B (Buttercup).
Explanation:
The stranger has been trying to make fun of that same horse of D'Artagnan, due to the extreme manner his friends giggle to respond.
Because once D'Artagnan gets to hear the random person consider his horse a buttercup making reference to either the horse's odd coloring, he turned and looked out again and begins a struggle mostly with passerby.
The other choices have no relation with the specified scenario. So that he calls him a Buttercup.
Why did the neighbours immediately call the cops? Did they already know he was guilty? Were the cops making him go insane at the end? Did the cops suspect him before he admitted it? What is wrong with the narrator mentally? Is he even human?
