D
Maude is incessantly engaging in diatribes against people who are materialistic. But her hypocrisy is evinced by the sentimental treatment of the watch her grandmother gave her. She certainly is very fond of the watch -- she worries about damaging it; in fact she always sets it carefully in a special box before going to bed. Which one of the following is an assumption on which the argument depends?
A: People who are not materialistic tend to have merely sentimental attachments to things.
B: Maude's watch is not the only material thing she especially cares for.
C: Possessions that come from relatives are treated with better care than those that do not.
D: Sentimental attachment to a single possession indicates being materialistic.