The answer is B.
Not only does Jean quit singing, but she refuses to do so, because as an American, she does not want to pledge her allegiance to the British king. This scene is tense because Jean differentiates herself and demonstrates an identity conflict in public. It is neither "carefree" nor "amusing." It is also not "jealous," because Jean is not envious of those who sing, and her classmates are not envious of her.
