Final answer:
The passage provided discusses Bernice's thoughts on popularity and social dynamics rather than directly answering the question about Sophie's actions.
Step-by-step explanation:
The information provided does not directly answer the question about Sophie's reaction to her roommates' attitudes because it is missing the context needed to relate to Sophie's situation. Instead, the passage provided discusses Bernice's reflections on popularity and her realization that other girls who she perceives as 'less positioned and less beautiful' seem to get more attention from men. Bernice seems to be contemplating this difference in social dynamics and decides to act on an impulse, though it is not clear what her action is.