Final answer:
Nick is likely confused and disgusted by the superficial and morally careless behavior he observes at Tom and Daisy's house. This response aligns with themes in literature that explore moral disintegration and the disparity between illusion and reality.
Step-by-step explanation:
Nick's feelings of confusion and disgust as he leaves Tom and Daisy's house stem from his observations of their superficial and morally dubious behavior throughout his visit. The instances mentioned don't directly answer the question but provide a context of exploring themes of illusion versus reality and moral disintegration present in literature. These examples illustrate the complex social dynamics and figurative masking of true emotions behind appearances that often lead characters into situations like Nick's, causing them to feel disillusioned and disheartened with the people around them.