Final answer:
In John Steinbeck's 'Of Mice and Men,' Slim's family is not mentioned, and he is characterized as a respected ranch worker who may have an underlying sense of loneliness.
Step-by-step explanation:
The character Slim in Of Mice and Men does not have his family mentioned within the text of the novel. Therefore, the correct option regarding Slim's family would be (B) Slim's family is not mentioned in the book. As for Slim's weaknesses, the book does not delineate explicit weaknesses, as Slim is portrayed as a skilled mule driver and a character who carries respect among the ranch workers. However, if we interpret his character closely, we might understand that his wisdom and loneliness are intimately connected, and thus, his weakness could be seen as a subtle sense of loneliness, emanating from his position as a respected but somewhat solitary figure.