The correct answer is B. Some people think that mice are dirty and frightening.
Explanation
An argument is a way to enunciate or justify a proposition, this can be oral or written and should be characterized by coherence and consistency because it has the objective to persuade the audience about the position of the author. On the other hand, a counterclaim is an argument used to refute or oppose another argument or statement and because of this, it should be coherent and consistent to successfully contradict and prove as invalid the argument in opposition. In the case of Shane, who says that "white mice are clean and friendly house pets" the counterclaim should show the way in which the assumption of mice as clean are friendly is incorrect, because of this the correct answer is "B. Some people think that mice are dirty and frightening", because this statement is in opposition with Shane's argument, it has coherence and consistency and it directly contradicts the main point of Shane's argument.
