When we say colloquialisms, these are words that are written informally in a literary work. Therefore, when writing an analytical essay, we should make sure that colloquialisms should be limited. It should be limited since an essay should be presented formally. The answer for this would be option D.
The death of Curly is an example of the law of club and fang. He learns that violence doesn't just come from men with clubs, it also comes from dogs with fangs.