d. adding a more-detailed description of the decorations, food, and drink
Explanation:
The other choices either introduce new information that is not present in the excerpt, or they do not provide enough detail to fully expand on the idea of Zaroff's sophisticated taste. d. adding a more-detailed description of the decorations, food, and drink would help to provide more information about what Zaroff has chosen to surround himself with, and how that reflects his background and taste.
