Answer:
B
Step-by-step explanation:
A is saying that the word mice should be mouse so then the sentence would be "Mouse got to scared and ran in their holes" but since the word their is usually used to describe many things, A doesn't work
B is saying that the word "mice" is an antecedent which makes sense because an antecedent is a word that can be used by pronouns to describe such as in this sentence the word "their" is describing mice. Another example is " Kate saw John and called to him" in this case "John" is an antecedent and the pronoun "him" is used to describe him.
C is saying that the word "their" is used to describe the action but that doesn't make sense because their is being used to say that they ran into their holes, and to be able to use their like that it would have to be "there" like if the sentence was "mice got to scared, there running into their holes"
D is basically saying that their replaces the word mice so instead of the sentence being "mice got to scared and ran in mice holes" which doesn't make that much sense