B. It supports the idea that people judged the author’s mother based on her language.
Explanation:
Amy Tan is an American-Chinese author, her mother had difficulties with English and this reflects a lot on the works written by the author, especially in “Mother Tongue”, where the author reports moments when her mother suffered some prejudice or discrimination for not being able to. Speak english language perfectly. The paragraph shown in the above question is a clear example of this. In this paragraph, the author supports the idea that people have judged her mother based on her language, to the point that the author needs to complain and shout at people who were rude to her mother.
