The text suggests that if Hello Kitty had a mouth, people might not be able to project their feelings onto her as easily. This leads to the inference that she might not be able to show any feelings herself, or that the nature of her perceived friendship might change.
Based on the text, the most logical conclusion is that if she had a mouth, she would likely be able to express emotions, which could alter the way people relate to her.
The core idea presented is that her current state (no mouth) allows for shared emotional experience. If she had a mouth, she could express her own feelings, which might make her seem less like a mirror of the viewer's emotions.
Considering the options provided and the emphasis on shared feelings, the most direct consequence of having a mouth would be the ability to express emotions, thus potentially altering the user's perception of her as a mirror.
The text states: "When people feel happy, they can look at her and think she is happy too. When they are sad, they think she is sad too." This implies that her current state of having no mouth is what allows for this emotional projection. If she had a mouth, this projection might be hindered because she would have her own expressed emotions.
Therefore, the most fitting answer among the choices, considering the contrast with her current state, would be related to her *own* expression of feelings.
Correct Answer: not be able to show any feelings