The phrase "Apple-pie American (born Chinese)" contributes to the speaker's tone toward her experience in America primarily by highlighting the complexity and duality of her identity. Thus, the best answer is:
A. It creates a confused tone by highlighting how the speaker identifies with two different cultures.
This choice reflects the internal struggle and complexity of the speaker's identity as someone who feels connected to both American culture and her Chinese heritage, leading to a sense of confusion or conflict in her experiences.