Final answer:
Carlson is portrayed as insensitive and focused on practicality in 'Of Mice and Men,' whereas Slim is depicted as empathetic and understanding. Therefore, the correct answer is (c), highlighting the significant differences in their characters.
Step-by-step explanation:
The characters Carlson and Slim from John Steinbeck's novel Of Mice and Men are distinct in their personalities and moral compasses. Carlson tends to be insensitive and pragmatic, focused more on practicality rather than the feelings of those around him. This is evident in the way he deals with Candy's old dog, suggesting without any emotional consideration that the dog should be put out of its misery. In sharp contrast, Slim is portrayed with a sense of empathy and understanding. He is well-respected on the ranch and often serves as a confidant and mediator. His calm and thoughtful nature makes him a stark contrast to Carlson's more brusque demeanour.
Given this information, the correct answer to the student's question is (c) Carlson is insensitive and practical, unlike Slim, who is empathetic. Unlike Carlson, Slim understands and appreciates the feelings of others, making him a more compassionate character in the story.