The author uses descriptive language to emphasize the contrast between abundance and hunger. The author describes the breakfast in great detail, using words like "swimming," "coarse," and "unadulterated" to create a sense of abundance. This abundance is contrasted with the despairing crowd of men outside, who are "gnawing starvation." The author's use of descriptive language creates a powerful image of the contrast between those who have and those who have not.
The correct answer is A.