The correct response is:
It shows she is similar to other shoppers of her era who purchase goods based on whims.
This choice reflects the characterization of Rosemary as someone who is indulging in her wealth and making impulsive purchasing decisions, aligning her with the societal behaviors of the time, particularly among the affluent. The passage highlights her extravagant shopping habits and her disregard for anything she doesn't like, which illustrates a common behavior among the wealthy during that historical period.