Final answer:
Without the text specific to Betty, it's not possible to accurately determine the point at which her attitude changes. Typically, such changes are observed through character actions, dialogue, and reactions in literature.
Step-by-step explanation:
To determine at what point Betty's attitude changes, we would need to look closely at the text that follows the sections provided. Since the provided extracts don't include a character named Betty, and there is no clear indication of her attitude changing in these excerpts, it's challenging to provide a specific answer to this question. However, usually in literature, a character's attitude change can be indicated through their actions, dialogue, and the reactions of others around them. For instance, in the given snippet, Bernice's challenge of coming up with an effective response underlines her discomfort, which might foreshadow an attitude change in her character.